Displaying publications 21 - 40 of 995 in total

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  1. Wong NA, Hunt LP, Marlow N
    J Trop Pediatr, 1997 02;43(1):54-8.
    PMID: 9078832 DOI: 10.1093/tropej/43.1.54
    A case-control study of antecedents of neonatal septicaemia was performed using 50 cases of neonatal septicaemia and 73 comparison infants from a Malaysian hospital nursery. Multivariate analysis indicated the following independent risk factors: maternal primiparity, pre-eclampsia, prolonged rupture of membranes, twin pregnancy, prematurity, assisted ventilation, umbilical catheterization, and formula feeding. Although the spectrum of causative organisms varied between our study and past studies from Western countries, the risk factors for developing neonatal septicaemia were strikingly similar. Therefore, preventative guidelines based on risk factors described in Western countries, should help reduce the incidence of neonatal septicaemia at this Malaysian hospital.
    Matched MeSH terms: Case-Control Studies
  2. Arumugam K, Lim JM
    Br J Obstet Gynaecol, 1997 Aug;104(8):948-50.
    PMID: 9255089
    This case-controlled study investigates whether the presence of menstrual characteristics, which may increase the exposure of the peritoneal cavity to retrograde menstruation, increases the risk of developing endometriosis. The menstrual characteristics considered were 1. age at menarche of less than 12 years, 2. duration of menstrual flow greater than five days and 3. menstrual cycle lengths of < 28 days. The frequency with which these menstrual characteristics occurred in 305 women with proven endometriosis was compared with their frequency in 305 age-matched women without endometriosis. Adjusting for the confounding factors of parity, age at first childbirth and social class, the only menstrual characteristic that was significantly associated with endometriosis was menstrual cycle lengths of less than 28 days (odds ratio 1.83; 95% confidence intervals 1.60-2.55). There was insufficient evidence to conclude that the presence of menstrual characteristics which may increase the exposure of the peritoneal cavity to retrograde menstruation, increase a women's risk of developing endometriosis. The association of short menstrual cycle lengths with endometriosis may have been consequential rather than causal.
    Matched MeSH terms: Case-Control Studies
  3. Eamsobhana P, Yong HS, Mak JW, Wattanakulpanich D
    PMID: 9561620
    A dot-blot ELISA was compared with a previously performed sandwich ELISA for the detection of Parastrongylus cantonensis antigens in sera from patients. Using the same monoclonal antibody and the same sera, 6 of 10 sera (60%) from parastronglyiasis patients were positive in dot-blot ELISA, whereas with sandwich ELISA, 5 of the same patient sera (50%) were positive. The specificity in both assays was 100% using 50 sera from patients with other parasitic diseases; of these, 10 each were from patients with cysticercosis, filariasis, gnathostomiasis, malaria and toxocariasis. The control group consisted of 53 sera from normal health Thais and Malaysians. The sensitivity of the assays was, however, slightly better with dot-blot ELISA and because it is simple, quick and cost-effective, it may be a test of choice for specific diagnosis of human parastrongyliasis.
    Matched MeSH terms: Case-Control Studies
  4. Fatimah M, Osman A
    Med J Malaysia, 1997 Dec;52(4):402-8.
    PMID: 10968118
    A case control study was conducted in 1996 among primary school student in Terengganu. The objective of the study is to determine the relationship between road traffic accidents and factors such as socio-economic status, distance from school, number of siblings, behavioural problems, knowledge and attitudes of pupil and their parents towards road safety and parents' educational status. A total of 140 cases was obtained from 3 urban schools and 3 from rural schools. Cases were matched with control according to age sex and locality of residence. There were significant associations between road traffic accidents and pupils' knowledge regarding road crossing (OR = 0.40, 95% CI = 0.19-0.85), parental supervision (OR = 0.43, 95% CI = 0.19, 0.64) and parents having driving licences (OR = 0.99, 95% CI = 0.856-0.999). Road safety education for pupils and parental supervision are key measures in preventing road traffic accidents among primary school children.
    Matched MeSH terms: Case-Control Studies
  5. Islam N, Kazmi F, Chusney GD, Mattock MB, Zaini A, Pickup JC
    Diabetes Care, 1998 Mar;21(3):385-8.
    PMID: 9540020
    OBJECTIVE: To investigate whether microalbuminuria is associated with markers of the acute-phase response in NIDDM and whether there are ethnic differences in this association among the three main racial groups in Malaysia.

    RESEARCH DESIGN AND METHODS: NIDDM patients of Chinese, Indian, and Malay origin attending a diabetic clinic in Kuala Lumpur, Malaysia, were matched for age, sex, diabetes duration, and glycemic control (n = 34 in each group). Urinary albumin-to-creatinine ratio was measured in an early morning urine sample. Biochemical measurements included markers of the acute-phase response: serum sialic acid, triglyceride, and (lowered) HDL cholesterol.

    RESULTS: The frequency of microalbuminuria did not differ among the Chinese, Indian, and Malay patients (44, 41, and 47%, respectively). In Chinese patients, those with microalbuminuria had evidence of an augmented acute-phase response, with higher serum sialic acid and triglyceride and lower HDL cholesterol levels; and urinary albumin-to-creatinine ratio was correlated with serum sialic acid and triglyceride. The acute-phase response markers were not different in Indians, with microalbuminuria being high in even the normoalbuminuric Indians; only the mean arterial blood pressure was correlated with urinary albumin-to-creatinine ratio in the Indians. Malay NIDDM subjects had an association of microalbuminuria with acute-phase markers, but this was weaker than in the Chinese subjects.

    CONCLUSIONS: Microalbuminuria is associated with an acute-phase response in Chinese NIDDM patients in Malaysia, as previously found in Caucasian NIDDM subjects. Elevated urinary albumin excretion has different correlates in other racial groups, such as those originating from the Indian subcontinent. The acute-phase response may have an etiological role in microalbuminuria.

    Matched MeSH terms: Case-Control Studies
  6. Davis TM, Singh B, Choo KE, Ibrahim J, Sulaiman SA, Kadir ZA, et al.
    J Intern Med, 1998 May;243(5):349-54.
    PMID: 9651556
    OBJECTIVES: To investigate the dynamic parathyroid response to rapidly induced, sustained hypocalcaemia in patients with acute malaria and in healthy volunteers.

    DESIGN: Serum intact parathormone (PTH) concentrations were measured on samples taken before and during a variable-rate tri-sodium citrate infusion designed to 'clamp' the whole blood ionised calcium concentration 0.20 mmol L-1 below baseline for 120 min.

    SUBJECTS: Six Malaysian patients aged 17-42 years with acute malaria, four of whom were restudied in convalescence, and 12 healthy controls aged 19-36 years.

    MAIN OUTCOME MEASURES: Whole-blood ionised calcium and serum intact PTH concentrations.

    RESULTS: The mean (SD baseline ionised calcium was lower in the malaria patients than in controls (1.09 +/- 0.06 vs. 1.18 +/- 0.03 mmol L-1, respectively; P = 0.01) but PTH concentrations were similar (3.0 +/- 1.8 vs. 3.3 +/- 1.3 pmol L(-1); P = 0.33). Target whole-blood ionised calcium concentrations were achieved more rapidly in the controls than the patients (within 15 vs. 30 min) despite significantly more citrate being required in the patients (area under the citrate infusion-time curve 0.95 (0.25 vs. 0.57 +/- 0.09 mmol kg-1; P < 0.01). The ratio of the change in serum PTH to that in ionised calcium (delta PTH/ delta Ca2+), calculated to adjust for differences in initial rate of fall of ionised calcium, was similar during the first 5 min of the clamp (132 +/- 75 x 10(-6) vs. 131 +/- 43 x 10(-6) in patients and controls, respectively, P > 0.05), as were steady-state serum PTH levels during the second hour (7.0 +/- 2.2 pmol L-1 in each case). Convalescent patients had normal basal ionised calcium levels but the lowest serum intact PTH levels before and during the clamp, consistent with an increase in skeletal PTH sensitivity after treatment.

    CONCLUSIONS: There is a decreased ionised calcium 'set point' for basal PTH secretion but a normal PTH response to acute hypocalcaemia in malaria. Skeletal resistance may attenuate the effects of the PTH response but patients with malaria appear relatively resistant to the calcium chelating effects of citrated blood products.

    Matched MeSH terms: Case-Control Studies
  7. Armstrong RW, Imrey PB, Lye MS, Armstrong MJ, Yu MC, Sani S
    Int J Cancer, 1998 Jul 17;77(2):228-35.
    PMID: 9650558 DOI: 10.1002/(SICI)1097-0215(19980717)77:2<228::AID-IJC
    We interviewed 282 histologically confirmed cases of nasopharyngeal carcinoma (NPC) in Chinese residents of Selangor and the Federal Territory, Malaysia, and an equal number of Chinese age-, sex-, and length-of-residence-matched controls sampled from the general population. Consumption of 55 dietary items during childhood, and 5 years pre-diagnosis of NPC, was analyzed by univariate and multivariate methods. Four salted preserved foods (fish, leafy vegetables, egg and root), fresh pork/beef organ meats and beer and liquor consumption exhibited strong positive associations, and 4 vegetable/fruit combinations strong negative associations with NPC. Factor analysis and multivariable modeling using estimated factor scores strongly supported separate effects on NPC of vegetables/fruits, salted preserved foods, pork/beef organ meats and beer/liquor consumption. Multivariable modeling associated NPC most clearly with high consumption of salted fish, salted eggs, pork/beef liver and beer and low consumption of Chinese flowering cabbage, oranges/tangerines and shrimp. A strong residual association of social class with NPC remained after adjustment for diet, which is consistent with a substantial role for non-dietary environmental factors.
    Matched MeSH terms: Case-Control Studies
  8. Ong LC, Chandran V, Zasmani S, Lye MS
    J Paediatr Child Health, 1998 Aug;34(4):363-8.
    PMID: 9727180
    OBJECTIVES: To compare the neurobehavioural outcome of children aged 6-12 years with severe closed head injury [sCHI] (coma > 24 h), mild-to-moderate head injury [mCHI] (coma < 6 h) and orthopaedic controls.

    METHODS: Twenty-nine children in each group, matched for age, sex and ethnicity, were assessed using the Glasgow outcome Scale (GOS), Weschler Intelligence Scale for Children (WISC-III), Movement Assessment Battery for Children (Movement ABC), Wide Range Assessment of Learning and Memory (WRAML) and a standardised neurological examination 6 months post-injury. Parental reporting of pre- and post-injury behaviour was documented using the Child Behaviour Checklist (CBCL).

    RESULTS: Seven (24.1%) children with sCHI and three (10.3%) orthopaedic controls had residual motor deficits. Three (10.3%) children with sCHI and none in the other groups faced problems with independent ambulation. Twenty-seven (93.1%) of those with sCHI and all children in the other groups had GOS scores of good recovery or moderate disability. Twenty-two (81.5%) sCHI, five (18.5%) mCHI and one (3.7%) orthopaedic control reported a deterioration in school performance. MANOVAS identified a significant injury group effect for performance skills (P = 0.007), verbal skills (P = 0.002), memory and learning (P = 0.001) and motor skills (P = 0.001). Repeated measures ANOVA for pre- and post-injury CBCL scores showed significant differences related to somatic complaints (P = 0.004), problems of socialising (P = 0.003), delinquency (P = 0.004), aggressiveness (P = 0.010), thought (P < 0.001) and attention (P < 0.001). Post-hoc univariate analysis showed the significant differences were between that of the sCHI children and the other two groups.

    CONCLUSION: Although most sCHI children seemed to have made good physical recovery, there were cognitive, motor, memory and learning difficulties and behavioural problems concomitant with a deterioration in school performance compared with those with lesser or no head injury. This highlights the need for better integrated rehabilitation services to enable a gradual return into mainstream school.

    Matched MeSH terms: Case-Control Studies
  9. Sivanesaratnam V
    Ann Acad Med Singap, 1998 Sep;27(5):622-6.
    PMID: 9919328
    Although the primary operative mortality following radical hysterectomy for stage IB and early stage IIA cervical carcinoma is less than 1%, survival is poor in those patients with histological evidence of "risk" features--lymph node metastases, lymphatic vascular tumour permeation and clinically undetected parametrial metastases. In the 7-year period 1983 to 1989, 239 patients with stage IB and early IIA disease had radical hysterectomy and pelvic lymphadenectomy. One hundred and eight patients (45.2%) had various poor prognostic histological features and received adjuvant chemotherapy--70 had cisplatin, vinblastine, bleomycin (PVB), 16 had mitomycin C (MMC) and 22 others received mitomycin C + 5-fluorouracil (5-FU). Although not randomised, the risk factors present in each group were identical. These patients have now been followed up for periods ranging from 8 to 14 years. All recurrences, except one, occurred within 23 months of surgery; in the remaining this occurred 8 years later. This suggests that very close long-term follow-up is needed. Recurrences were markedly higher in the group who refused adjuvant chemotherapy (31.6%). The 10-year survival in patients without risk factors was 97.2%. In those patients with risk factors refusing adjuvant therapy it was 73.7%. The adjuvant chemotherapy group had a better survival of 86.1% (P = 0.001). The 10-year survivals in patients with positive nodes were similar--66.7% in the MMC group and 71.4% in the PVB group. The 10-year survival in patients with squamous cell carcinoma was significantly better (90.3%) in the mitomycin C (and MMC + 5-FU) group compared to the PVB group (80.1%) (P = 0.005). The 10-year survival in patients with adenocarcinoma and adenosquamous carcinoma was significantly better (96.3%) in the PVB group compared to those receiving MMC (and MMC + 5-FU) (57.1%) (P = 0.01). It would, thus, appear that the adjuvant chemotherapy of choice for patients with squamous cell carcinoma would be MMC (and MMC + 5-FU) and for those with adenocarcinoma, the PVB regime.
    Matched MeSH terms: Case-Control Studies
  10. Ong LC, Afifah I, Sofiah A, Lye MS
    Ann Trop Paediatr, 1998 Dec;18(4):301-7.
    PMID: 9924586 DOI: 10.1080/02724936.1998.11747964
    A hospital study was carried out to compare parenting stress among 87 Malaysian mothers of children with cerebral palsy and a control group (comprising 87 mothers of children without disability who attended the walk-in paediatric clinic), using the Parenting Stress Index (PSI) questionnaire. Multiple regression analysis was used to determine socio-demographic and medical factors associated with child-domain stress (CDS) and parent-domain stress (PDS). Mothers of children with cerebral palsy scored significantly higher than control subjects on all sub-scales of CDS and PDS (p < 0.01), except for the sub-scale of 'role restriction'. The presence of cerebral palsy (p < 0.001) and activities of daily living (ADL) scores (p < 0.001) were significantly associated with CDS. Factors predictive of PDS were ADL scores (p < 0.001), number of hospitalizations over the past year (p = 0.024), level of maternal education (p = 0.018) and Chinese mothers (p < 0.001). Although this study demonstrated that Malaysian mothers of children with cerebral palsy experienced higher levels of stress than controls, the impact of cerebral palsy per se on parenting stress was modified by other factors such as increased care-giving demands, low maternal education and ethnic background. Habilitation should be directed at easing the burden of daily care, minimizing hospital re-admissions and targeting appropriate psychosocial support at specific subgroups to change parental perception and expectations.
    Study site: neurology clinics or physiotherapy department or inpatients, Paediatric Institute, Kuala Lumpur, Malaysia
    Matched MeSH terms: Case-Control Studies
  11. Choo, C.M., Quah, B.S., Rostenberghe, H.V., Choo, K.E.
    MyJurnal
    A case control study was conducted to identify the risk factors for acute lower respiratory tract infections (ALRI) in hospitalised children in Kelantan. One hun-dred and twenty children aged one month to five years hospitalised for ALRI were matched by age with 120 children as controls. Data on demography and expo-sure to putative risk factors were collected by interview-ing parents or caretakers. Anthropometric measure-ments were also carried out to assess the nutritional sta-tus of the children. For each risk factor studied, the odds ratios for exposure and disease were calculated by using univariate analysis followed by multiple logistic regression analysis to determine those factors which remained significant.
    The presence of sibling(s) who coughed at home (OR 12.1, 95% CI 5.2-28.1), crowding in bedroom (OR 4.4, 95% CI 2.1-9.0), weight-for-age < 3rd percentile (OR 9.0, 95% CI 3.1-25.8), lack of breast feeding (OR 9.4, 95% CI 2.3-38.4) and incomplete immunisation (OR 4.5, 95% CI 1.7-12.1) were significant indepen-dent risk factors for ALRI. Other factors like poverty, maternal education level, male sex, low birth weight, history of atopy, family history of asthma and indoor air pollution were not associated with an increased risk of ALRI.
    This study showed that poor nutritional status, inap-propriate child care practices and poor living conditions, particularly those related to crowding, predispose to ALRI in Kelantanese children necessitating hospital admission. A change in these factors may reduce the morbidity and mortality of childhood ALRI in Kelantan.
    Matched MeSH terms: Case-Control Studies
  12. Yakub MA, Pau KK, Awang Y
    Ann Thorac Cardiovasc Surg, 1999 Feb;5(1):36-9.
    PMID: 10074567
    A minimally invasive approach to aortic valve surgery through a transverse incision ("pocket incision") at the right second intercostal space was examined. Sixteen patients with a mean age of 30 years underwent this approach. The third costal cartilage was either excised (n = 5) or dislocated (n = 11). The right internal mammary artery was preserved. Cardiopulmonary bypass (CPB) was established with aortic-right atrial cannulation in all except the first case. Aortic valve replacements (AVR) were performed in 15 patients and one had aortic valve repair with concomitant ventricular septal defect closure. There was no mortality and no major complications. The aortic cross-clamp, CPB and operative times were 72 +/- 19 mins, 105 +/- 26 mins and 3 hrs 00 min +/- 29 mins respectively. The mean time to extubation was 5.7 +/- 4.0 hrs, ICU stay of 27 +/- 9 hrs and postoperative hospital stay of 5.1 +/- 1.2 days. Minimally invasive "pocket incision" aortic valve surgery is technically feasible and safe. It has the advantages of central cannulation for CPB, preservation of the internal mammary artery and avoiding sternotomy. This approach is cosmetically acceptable and allows rapid patient recovery.
    Matched MeSH terms: Case-Control Studies
  13. Ho JJ, Amar HS, Mohan AJ, Hon TH
    J Paediatr Child Health, 1999 Apr;35(2):175-80.
    PMID: 10365356
    OBJECTIVE: To examine the prevalence and pattern of neurodevelopmental handicap at 2 years of age in very low birth weight infants (VLBW) admitted in 1993 to a level 3 Malaysian nursery.

    METHODS: All VLBW babies born in the hospital or referred for neonatal care during 1993 were enrolled prospectively in the study. At 2 years of age development was assessed using the Griffiths mental scales. Neurological, hearing and visual assessments were graded into five groups according to functional handicap. Control infants were randomly selected during attendance at a primary health care clinic.

    RESULTS: One hundred and fifty VLBW infants were admitted and 82 (54.6%) survived to 2 years, of whom 77 (93.9%) were assessed. The mean General Quotient (GQ) on the Griffiths Scales was 94 (15.7) for the study group and 104 (8.3) for the 60 controls. For GQ, 21 (27.3%) of the study population were 1 or more SD below the mean (18 between 1 and 2 SD and 3 > 2 SD) compared with 1 (1.6%) of the controls who was 1-2 SD below the mean. Visual impairment occurred in 2 study infants and none of the controls. There was no hearing impairment in either group. Cerebral palsy occurred in 3 (1 mild and 2 moderate-severe) of the study group and none of the controls. Functionally 18 (23.3%) of the study group had mild handicap, 1 (1.3%) moderate, 2 (2.5%) severe, 2 (2.5%) multiply severe and 54 (70.2%) were normal.

    CONCLUSION: Although survival was low, overall rates of functional handicap were similar to those reported in developed countries but the proportion with moderate or severe handicap was low.

    Matched MeSH terms: Case-Control Studies
  14. Asits S, Noorhidayah I, Osman A
    Med J Malaysia, 1999 Jun;54(2):200-9.
    PMID: 10972030
    Malaria is an infectious disease that remains the main health problem in Tawau, Sabah. A case control study was carried out in the district to determine the influence of seasonal migration on malaria occurrence. Respondents consisted of 142 cases who were randomly selected from the reported cases in 1996 and they were pair-matched with 142 controls from the same villages by age and sex. The results showed that malaria occurrence was significantly associated with movement to the jungle, use of preventive measures during migration and frequency of using treated bednets (p < 0.05). The risk of individuals migrated to the jungle was 6 times as compared to those who do not (unadjusted Odd Ratio = 5.50, 95% CI 1.16-35.89) and they were more likely to get the infection if they did not use bednets (OR = 3.57, 95% CI 1.57-9.06). Health promotion campaign on the use of bednets especially during short term migration should be given priority in any malarial intervention program.
    Matched MeSH terms: Case-Control Studies
  15. Choong ML, Sethi SK, Koay ES
    Hum Biol, 1999 Jun;71(3):381-97.
    PMID: 10380374
    We determined the allelic (X+/X-, M+/M-, and E+/E-) distribution frequencies of the XbaI, MspI, and EcoRI restriction fragment length polymorphisms (RFLPs) in the apolipoprotein B gene in a control group of 374 healthy Chinese, Malays, and Indians and in a hyperlipidemic cohort of 131 Chinese patients. Covariability between the RFLPs and serum lipid, lipoprotein, and apolipoprotein concentrations was also studied. We found a lower frequency (average 0.0829) of the X+ allele and higher frequencies of the E+ (average 0.9452) and M+ (average 0.9772) alleles in our study population compared with frequencies reported in other populations. The 3 polymorphic sites did not contribute to significant variations in lipid levels (p > 0.1 in all cases). Also, there was no significant variation in genotype frequencies between the control subjects and the hyperlipidemic subjects. Despite their relative close proximity within the APOB gene sequence, the 3 polymorphic sites did not show any significant linkage disequilibrium. However, the presence of the X+ cutting site was in linkage disequilibrium with the Del allele of the 5' insertion-deletion polymorphism and the E-allele was in linkage disequilibrium with the 3' VNTR located near the 3' end of the coding region of the APOB gene.
    Matched MeSH terms: Case-Control Studies
  16. Boo NY, Goh ES
    J Trop Pediatr, 1999 Aug;45(4):195-201.
    PMID: 10467829
    In a case-control study carried out in the Kuala Lumpur Maternity Hospital between 1st July 1995 and 31st January 1996 the objectives were (1) to determine the rate of breastfeeding in surviving very low birthweight (VLBW, < or = 1500 g) Malaysian infants following the introduction of the Baby Friendly Hospital Concept, and (2) to identify significant predictors associated with successful breastfeeding in these infants. During the study period, 201 (1.24 per cent) of live-born infants were VLBW infants, 192 (95.5 per cent) were Malaysians, and 141 (73.4 per cent) of them survived to go home. The breastfeeding rate among all surviving VLBW Malaysian infants at the time of discharge was 40.2 per cent (57/141). The mothers of 126 (89.4 per cent) VLBW Malaysian infants were interviewed before discharge. Logistic regression analysis showed that, after controlling for various confounders, the significant predictors associated with successful breastfeeding were: (a) Malay mothers (odds ratio: 6.0; 95 per cent CI: 1.9, 19.4), (b) mothers with educational levels of between 7 and 9 years (odds ratio: 3.6; 95 per cent CI: 1.0, 12.2), and (c) earlier age of commencement of enteral feeds in the VLBW infants (for each additional day delay in commencement of feeding, odds ratio of breastfeeding was 0.5; 95 per cent CI: 0.4, 0.8).
    Matched MeSH terms: Case-Control Studies
  17. Boo NY, Puah CH, Lye MS
    J Trop Pediatr, 2000 Feb;46(1):15-20.
    PMID: 10730035
    A case-control study was carried out on 152 extremely low birthweight (ELBW, < 1000 g) infants born consecutively in a large Malaysian maternity hospital during a 21-month period to determine the significant predictors associated with survival at discharge. Forty-nine (32.2 per cent) of these infants survived and 103 (67.8 per cent) died. The survivors weighed significantly heavier (mean = 888 g, SD = 99) than infants who died (mean = 763 g, SD = 131; p < 0.0001). They were also of higher gestational age (mean = 28.7 weeks, SD = 2.2) than those who died (mean = 26.7 weeks, SD = 2.5; p < 0.0001). Logistic regression analysis showed that, after controlling for various confounders, only three factors were significantly associated with the survival of these infants. These were: (1) increasing birthweight of the infants (with every gram increase in birthweight, adjusted odds ratio of survival was: 1.009; 95 per cent CI 1.004, 1.015; p = 0.0006); (2) given nasal continuous positive airway pressure for treatment of respiratory distress syndrome (adjusted odds ratio of survival: 4.2; 95 per cent CI 1.2, 14.0; p = 0.02); and (3) given expressed breastmilk (adjusted odds ratio of survival: 57.5; 95 per cent CI: 7, 474; p = 0.0002). Maternal illness, intrapartum problems, ethnicity, gestational age, use of antenatal steroid, modes of delivery, Apgar scores, congenital anomalies, respiratory distress syndrome, persistent ductus arteriosus, septicemia, necrotising enterocolitis, chronic lung disease, oxygen therapy, intermittent positive pressure ventilation, surfactant therapy, and blood transfusion were not significant factors associated with increased survival.
    Matched MeSH terms: Case-Control Studies
  18. Chew MH, Arguin PM, Shay DK, Goh KT, Rollin PE, Shieh WJ, et al.
    J Infect Dis, 2000 May;181(5):1760-3.
    PMID: 10823780
    During 10-19 March 1999, 11 workers in 1 of 2 Singaporean abattoirs developed Nipah-virus associated encephalitis or pneumonia, resulting in 1 fatality. A case-control study was conducted to determine occupational risk factors for infection. Case patients were abattoir A workers who had anti-Nipah IgM antibodies; control subjects were randomly selected abattoir A workers who tested negative for anti-Nipah IgM. All 13 case patients versus 26 (63%) of 41 control subjects reported contact with live pigs (P=.01). Swine importation from Malaysian states concurrently experiencing a Nipah virus outbreak was banned on 3 March 1999; on 19 March 1999, importation of Malaysian pigs was banned, and abattoirs were closed. No unusual illnesses among pigs processed during February-March were reported. Contact with live pigs appeared to be the most important risk factor for human Nipah virus infection. Direct contact with live, potentially infected pigs should be minimized to prevent transmission of this potentially fatal zoonosis to humans.
    Matched MeSH terms: Case-Control Studies
  19. Parashar UD, Sunn LM, Ong F, Mounts AW, Arif MT, Ksiazek TG, et al.
    J Infect Dis, 2000 May;181(5):1755-9.
    PMID: 10823779
    An outbreak of encephalitis affecting 265 patients (105 fatally) occurred during 1998-1999 in Malaysia and was linked to a new paramyxovirus, Nipah, that infected pigs, humans, dogs, and cats. Most patients were pig farmers. Clinically undetected Nipah infection was noted in 10 (6%) of 166 community-farm controls (persons from farms without reported encephalitis patients) and 20 (11%) of 178 case-farm controls (persons from farms with encephalitis patients). Case patients (persons with Nipah infection) were more likely than community-farm controls to report increased numbers of sick/dying pigs on the farm (59% vs. 24%, P=.001) and were more likely than case-farm controls to perform activities requiring direct contact with pigs (86% vs. 50%, P=.005). Only 8% of case patients reported no contact with pigs. The outbreak stopped after pigs in the affected areas were slaughtered and buried. Direct, close contact with pigs was the primary source of human Nipah infection, but other sources, such as infected dogs and cats, cannot be excluded.
    Matched MeSH terms: Case-Control Studies
  20. Amal NM, Lye MS, Ksiazek TG, Kitsutani PD, Hanjeet KS, Kamaluddin MA, et al.
    PMID: 11127330
    A hospital-based case-control study of viral encephalitis was carried out at Port Dickson Hospital, in the state of Negeri Sembilan, Malaysia. Between March and May 1999, 69 clinically diagnosed viral encephalitis cases and 31 controls were interviewed. Job histories on pig farming activities were assessed by a group of epidemiologists and veterinary surgeons. Results show that among clinical cases of viral encephalitis, 52 (75.4%) cases were diagnosed to have Nipah virus infection based on positive serology for antibodies to the cross-reacting Hendra virus antigen. The Nipah virus encephalitis was significantly associated with a history of working in pig farms (p < 0.001, OR = 196.0, 95% CI = 20.4-4741.6), history of contact with animals (p < 0.001, OR = 38.3, 95% CI = 8.2-209.0) and with history of direct contact with pigs (p = 0.002, OR = 34.4, 95% CI = 2.6-1,024.4). The Nipah virus infection was also significantly associated with history of feeding/cleaning pigs (p < 0.001, OR = 102, 95% CI = 11.9-2,271.5). These results provide evidence that involvement in pig farming activities is significantly associated with the risk of getting Nipah virus infection. They are potential risk factors for Nipah virus transmission in the major pig-producing area of Bukit Pelandok, Port Dickson Negeri Sembilan.
    Matched MeSH terms: Case-Control Studies
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