Displaying publications 61 - 80 of 361 in total

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  1. Ho CC, Tong SF, Low WY, Ng CJ, Khoo EM, Lee VK, et al.
    BJU Int, 2012 Jul;110(2):260-5.
    PMID: 22093057 DOI: 10.1111/j.1464-410X.2011.10755.x
    Study Type - Therapy (RCT). Level of Evidence 1b. What's known on the subject? and What does the study add? Testosterone deficiency syndrome can be treated with testosterone replacement in the form of injectable, transdermal, buccal and oral preparations. Long-acting i.m. testosterone undecanoate 1000 mg, which is given at 10-14 week intervals, has been shown to be adequate for sustaining normal testosterone levels in hypogonadal men. This study confirms that long-acting i.m. testosterone undecanoate is effective in improving the health-related quality of life in men with testosterone deficiency syndrome as assessed by the improvement in the Aging Male Symptoms scale. Testosterone treatment can be indicated in men who have poor health-related quality of life resulting from testosterone deficiency syndrome.
    Matched MeSH terms: Double-Blind Method
  2. Ooi LG, Ahmad R, Yuen KH, Liong MT
    J Dairy Sci, 2010 Nov;93(11):5048-58.
    PMID: 20965319 DOI: 10.3168/jds.2010-3311
    This randomized, double-blind, placebo-controlled, and parallel-designed study was conducted to investigate the effect of a synbiotic product containing Lactobacillus gasseri [corrected] CHO-220 and inulin on lipid profiles of hypercholesterolemic men and women. Thirty-two hypercholesterolemic men and women with initial mean plasma cholesterol levels of 5.7±0.32 mmol/L were recruited for the 12-wk study. The subjects were randomly allocated to 2 groups; namely the treatment group (synbiotic product) and the control group (placebo), and each received 4 capsules of synbiotic or placebo daily. Our results showed that the mean body weight, energy, and nutrient intake of the subjects did not differ between the 2 groups over the study period. The supplementation of synbiotic reduced plasma total cholesterol and low-density lipoprotein (LDL)-cholesterol by 7.84 and 9.27%, respectively, compared with the control over 12 wk. Lipoproteins were subsequently subfractionated and characterized. The synbiotic supplementation resulted in a lower concentration of triglycerides in the very low, intermediate, low, and high-density lipoprotein particles compared with the control over 12 wk. The concentration of triglycerides in lipoproteins is positively correlated with an increased risk of atherosclerosis. Our results showed that the synbiotic might exhibit an atheropreventive characteristic. Cholesteryl ester (CE) in the high-density lipoprotein particles of the synbiotic group was also higher compared with the control, indicating greater transport of cholesterol in the form of CE to the liver for hydrolysis. This may have led to the reduced plasma total cholesterol level of the synbiotic group. The supplementation of synbiotic also reduced the concentration of CE in the LDL particles compared with the control, leading to the formation of smaller and denser particles that are more easily removed from blood. This supported the reduced LDL-cholesterol level of the synbiotic group compared with the control. Our present study showed that the synbiotic product improved plasma total- and LDL-cholesterol levels by modifying the interconnected pathways of lipid transporters. In addition, although Lactobacillus gasseri [corrected] CHO-220 could deconjugate bile, our results showed a statistically insignificant difference in the levels of conjugated, deconjugated, primary, and secondary bile acids between the synbiotic and control groups over 12 wk, indicating safety from bile-related toxicity.
    Matched MeSH terms: Double-Blind Method
  3. Tan PC, Khine PP, Vallikkannu N, Omar SZ
    Obstet Gynecol, 2010 May;115(5):975-981.
    PMID: 20410771 DOI: 10.1097/AOG.0b013e3181d99290
    OBJECTIVE: To compare the effects of promethazine with those of metoclopramide for hyperemesis gravidarum.

    METHODS: Women at their first hospitalization for hyperemesis gravidarum were approached when intravenous antiemetic therapy was needed. They were randomly assigned to receive 25 mg promethazine or 10 mg metoclopramide every 8 hours for 24 hours in a double-blind study. Primary outcomes were vomiting episodes by diary and well-being visual numerical rating scale score (10-point scale) in the 24-hour main study period. Participants also filled out an adverse-effects questionnaire at 24 hours and a nausea visual numerical rating scale score at recruitment and at 8, 16, and 24 hours.

    RESULTS: A total of 73 and 76 women, randomized to metoclopramide and promethazine, respectively, were analyzed. Median vomiting episodes were one (range 0-26) compared with two (range 0-26) (P=.81), and well-being visual numerical rating scale scores were 8 (range 1-10) compared with 7 (range 2-10) (P=.24) for metoclopramide and promethazine, respectively. Repeat-measures analysis of variance of the nausea visual numerical rating scale scores showed no significant difference between study drugs (F score=0.842, P=.47). Reported drowsiness (58.6% compared with 83.6%, P=.001, number needed to treat to benefit [NNTb] 5), dizziness (34.3% compared with 71.2%, P

    Matched MeSH terms: Double-Blind Method
  4. Haines C, Yu SL, Hiemeyer F, Schaefers M
    Climacteric, 2009 Oct;12(5):419-26.
    PMID: 19479489 DOI: 10.1080/13697130902748967
    To compare the effect of micro-dose transdermal estradiol and placebo on the incidence and severity of menopausal symptoms and well-being in postmenopausal Asian women with vasomotor symptoms.
    Matched MeSH terms: Double-Blind Method
  5. Noorddin Y, Raha AR, Jaafar MZ, Rozaidi SH, Muraly S, Marlizan MY
    Med J Malaysia, 2007 Jun;62(2):127-9.
    PMID: 18705444 MyJurnal
    The use of laryngeal mask airway (LMA) as an alternative to the endotracheal tube (ETT) is becoming more popular in the practice of anesthesia. It is undeniable that this device has numerous advantages over endotracheal tube, however it does not provide an airtight seal between the airway and atmospheric gases. This may lead to pollution of the operating room environment with nitrous oxide. One hundreds adult patients undergoing general anaesthesia were divided into two groups. The airway in Group I was maintained with LMA with spontaneous ventilation and ETT with intermittent positive pressure ventilation (IPPV) was used for Group II. The result demonstrated that the ETT group recorded concentrations of nitrous oxide that were well above the NIOSH recommended eight hour time weighted average of 25ppm throughout the duration of surgery when compared to patients using LMA.
    Matched MeSH terms: Double-Blind Method
  6. Low BY, Liong ML, Yuen KH, Chee C, Leong WS, Chong WL, et al.
    J Urol, 2008 Apr;179(4):1461-9.
    PMID: 18295277 DOI: 10.1016/j.juro.2007.11.060
    PURPOSE: We determined the clinical efficacy and safety of terazosin in the treatment of patients with female lower urinary tract symptoms.
    MATERIALS AND METHODS: A total of 100 females 20 to 70 years old who met the inclusion criteria of total International Prostate Symptom Score 8 or greater, symptom duration 1 or more months, and did not meet any exclusion criteria were entered into the study. Subjects were randomized to receive terazosin or placebo in titrated dose from 1 mg od, 1 mg twice daily to 2 mg twice daily during 14 weeks. Successful treatment outcomes use primary end point of International Prostate Symptom Score quality of life 2 or less and secondary end point of total International Prostate Symptom Score 7 or less. Other outcome measures included International Prostate Symptom Score individual item scores, King's Health Questionnaire quality of life domains, objective assessment parameters of 24-hour frequency volume chart, maximum flow rate and post-void residual urine.
    RESULTS: Using a primary end point, 32 of 40 (80%) evaluable terazosin subjects responded in contrast to 22 of 40 (55%) evaluable placebo subjects (p <0.02). The secondary end point revealed a successful outcome in 85% of terazosin subjects vs 55% in placebo (p <0.01). Of the 7 International Prostate Symptom Score individual item scores, only item scores of frequency and straining showed statistically significant reductions with terazosin (p <0.01). All King's Health Questionnaire quality of life domains except domain of severity measures showed statistically significant improvement with terazosin (p <0.05). There were no differences between treatment groups in all objective assessment parameters. Of all evaluable subjects 23 of 40 (58%) on placebo experienced adverse events vs 16 of 40 (40%) on terazosin (p >0.05).
    CONCLUSIONS: Terazosin proved to be more effective and safe than placebo in patients with female lower urinary tract symptoms.
    Matched MeSH terms: Double-Blind Method
  7. Lee SW, Liong ML, Yuen KH, Leong WS, Chee C, Cheah PY, et al.
    Am J Med, 2008 Jan;121(1):79.e1-7.
    PMID: 18187077 DOI: 10.1016/j.amjmed.2007.07.033
    Chronic prostatitis/chronic pelvic pain syndrome (CP/CPPS) afflicts 2%-10% of adult men. Available therapies offer little or no proven benefit. Because acupuncture represents an attractive "natural" therapy, we compared the efficacy of acupuncture to sham acupuncture for CP/CPPS.
    Matched MeSH terms: Double-Blind Method
  8. Batra YK, Shamsah M, Al-Khasti MJ, Rawdhan HJ, Al-Qattan AR, Belani KG
    Int J Clin Pharmacol Ther, 2007 Mar;45(3):155-60.
    PMID: 17416110
    OBJECTIVE: Ketamine inhibits the NMDA receptors via non-competitive antagonism, resulting in an antihyperalgesic effect achieved by doses of ketamine much smaller than are required for analgesia. The aim of this study was to determine the extent to which small-dose ketamine, when used in conjunction with remifentanil, has a morphine-sparing effect in the perioperative period.

    MATERIALS AND METHODS: In this randomized, double-blind, placebo-controlled prospective study, we enrolled 40 children undergoing tonsillectomy. Anesthetic care was standardized. Intraoperative analgesia was provided with remifentanil 0.5 microg x kg(-1) followed by an infusion of 0.25 microg x kg(-1) x min(-1). Group I (ketamine, n = 20) received a bolus dose of ketamine 0.5 mg x kg(-1) followed by a continuous infusion of 2 microg x kg(-1) x min(-1) before start of surgery. The infusion was stopped when surgery ended. Group II (placebo, n=20) received normal saline in the same manner. Pain was assessed postoperatively using the Children's Hospital Eastern Ontario Pain Scale (CHEOPS; range of scores 4 13), and total morphine consumption was recorded in the postanesthesia care unit (PACU). Patients were transferred to the ward and morphine was administered via a patient-controlled analgesia (PCA) device and analgesia was recorded using a visual analogue scale (VAS) (0 - 10).

    RESULTS: Intraoperative remifentanil consumption was not different between the ketamine group (0.29+/-0.09 microg x kg x min(-1) ) and the control group (0.24+/-0.07 microg x kg x min(-1)). There were no significant differences between CHEOPS scores and VAS score between the two groups. The total mean morphine consumption in the ward was not significantly different between the two groups: 376.5 +/-91.6 microg x kg(-1) with ketamine and 384.4+/-97.3 microg x kg(-1) with placebo. The time-to-first analgesic requirement was also similar in both groups.

    CONCLUSIONS: Small-dose ketamine did not decrease postoperative pain after tonsillectomy in children when added to a continuous intraoperative remifentanil infusion.

    Matched MeSH terms: Double-Blind Method
  9. Tan PC, Valiapan SD, Tay PY, Omar SZ
    BJOG, 2007 Jul;114(7):824-32.
    PMID: 17506788
    To compare concurrent oxytocin with dinoprostone pessary versus dinoprostone pessary in labour induction for nulliparas with an unfavourable cervix.
    Matched MeSH terms: Double-Blind Method
  10. Nor Azlin MI, Haliza H, Mahdy ZA, Anson I, Fahya MN, Jamil MA
    Int J Gynaecol Obstet, 2005 Jan;88(1):5-8.
    PMID: 15617697
    To study the effect of ritodrine tocolysis on the success of external cephalic version (ECV) and to assess the role of ECV in breech presentation at our centre.
    Matched MeSH terms: Double-Blind Method
  11. Mazlyn MM, Nagarajah LH, Fatimah A, Norimah AK, Goh KL
    J Gastroenterol Hepatol, 2013 Jul;28(7):1141-7.
    PMID: 23432408 DOI: 10.1111/jgh.12168
    Evidence suggests that probiotics reduce certain constipation-related symptoms. Lactobacillus casei strain Shirota has never been tested as treatment for functional constipation in otherwise-healthy subjects. To evaluate the efficacy of this probiotic among adults with functional constipation was aimed.
    Matched MeSH terms: Double-Blind Method
  12. Tan PC, Soe MZ, Sulaiman S, Omar SZ
    Obstet Gynecol, 2013 Feb;121(2 Pt 1):253-259.
    PMID: 23344273 DOI: 10.1097/AOG.0b013e31827e7fd9
    OBJECTIVE: To compare immediate with delayed (4 hours) oxytocin infusion after amniotomy on vaginal delivery within 12 hours and patient satisfaction with the birth process.

    METHODS: Parous women with favorable cervixes after amniotomy for labor induction were randomized to immediate titrated oxytocin or placebo intravenous infusion in a double-blind noninferiority trial. After 4 hours, study infusions were stopped, the women were assessed, and open-label oxytocin was started if required. Maternal satisfaction with the birth process was assessed with a 10-point visual numerical rating scale (lower score, greater satisfaction).

    RESULTS: Vaginal delivery rates at 12 hours were 91 of 96 (94.8%) compared with 91 of 94 (96.8%) (relative risk 0.98, 95% confidence interval [CI] 0.92-1.04, P=.72), and maternal satisfaction on a visual numerical rating scale (median [interquartile range]) was 3 [3-4] compared with 3 [3-5], P=.36 for immediate compared with delayed arm, respectively). Cesarean delivery, maternal fever, postpartum hemorrhage, uterine hyperactivity, and adverse neonatal outcome rates were similar between arms. The immediate oxytocin arm had a shorter amniotomy-to-delivery interval of 5.3±3.1 compared with 6.9±2.9 hours (P

    Matched MeSH terms: Double-Blind Method
  13. Batra YK, Ivanova M, Ali SS, Shamsah M, Al Qattan AR, Belani KG
    Paediatr Anaesth, 2005 Dec;15(12):1094-7.
    PMID: 16324030 DOI: 10.1111/j.1460-9592.2005.01633.x
    BACKGROUND: Laryngospasm is a well-known problem typically occurring immediately following tracheal extubation. Propofol is known to inhibit airway reflexes. In this study, we sought to assess whether the empiric use of a subhypnotic dose of propofol prior to emergence will decrease the occurrence of laryngospasm following extubation in children.
    METHODS: After approval from the Institutional Ethics Committee and informed parental consent, we enrolled 120 children ASA physical status I and II, aged 3-14 years who were scheduled to undergo elective tonsillectomy with or without adenoidectomy under standard general anesthesia. Before extubation, the patients were randomized and received in a blinded fashion either propofol 0.5 mg.kg(-1) or saline (control) intravenously. Tracheal extubation was performed 60 s after administration of study drug, when the child was breathing regularly and reacting to the tracheal tube.
    RESULTS: Laryngospasm was seen in 20% (n = 12) of the 60 children in the control group and in only 6.6% (n = 4) of 60 children in the propofol group (P < 0.05).
    CONCLUSIONS: During emergence from inhalational anesthesia, propofol in a subhypnotic dose (0.5 mg.kg(-1)) decreases the likelihood of laryngospasm upon tracheal extubation in children undergoing tonsillectomy with or without adenoidectomy.
    Matched MeSH terms: Double-Blind Method
  14. Chan KY, Lau CL, Adeeb SM, Somasundaram S, Nasir-Zahari M
    Plast Reconstr Surg, 2005 Sep 15;116(4):1013-20; discussion 1021-2.
    PMID: 16163087
    BACKGROUND: Hypertrophic scarring caused by sternotomy is prevalent among Asians. The effectiveness of silicone gel in scar prevention may influence the decision of surgeons and patients regarding its routine use during the postoperative period.

    METHODS: The authors conducted a randomized, placebo-controlled, double-blind, prospective clinical trial. The susceptibility to scar development varied among patients; therefore, sternal wounds were divided into the upper half and the lower half. Two types of coded gel prepared by an independent pharmacist were used on either half. Thus, selection and assessment biases and confounders were eliminated.

    RESULTS: One hundred wounds in 50 patients were randomized into two arms, 50 control and 50 silicone gels. The median age was 61 years and there were 34 men and 16 women. Ethnic distribution was 28 Malays, 18 Chinese, and four Indians. No side effect caused by the silicone gel was noted. Ninety-eight percent of patients had moderate to good compliance. The incidence of sternotomy scar was 94 percent. At the third month postoperatively, the silicone gel wounds were scored lower when compared with the control wounds. The differences were statistically significant in all parameters, including pigmentation (p = 0.02), vascularity (p = 0.001), pliability (p = 0.001), height (p = 0.001), pain (p = 0.001), and itchiness (p = 0.02).

    CONCLUSIONS: The effect of silicone gel in prevention of hypertrophic scar development in sternotomy wounds is promising. There are no side effects and patients' compliance is satisfactory. This study may popularize the use of silicone gel in all types of surgery to minimize the formation of hypertrophic scars in the early postoperative period.

    Matched MeSH terms: Double-Blind Method
  15. Shahar S, Aziz AF, Ismail SN, Yahya HM, Din NC, Manaf ZA, et al.
    Clin Interv Aging, 2015;10:1505-20.
    PMID: 26445532 DOI: 10.2147/CIA.S86411
    BACKGROUND: Polygonum minus (PM) or locally known in Malaysia, as "kesum" is rich in micronutrients and natural antioxidants. However, its beneficial effect on outcome associates with oxidative stress including cognitive function is yet to be discovered. We assessed the efficacy of PM extract (LineMinus™) on cognitive function and psychosocial status among middle-aged women in Klang Valley of Malaysia.

    METHODS: A randomized, double-blind, placebo-controlled trial among 35 healthy middle-aged women was performed, and subjects were randomized to receive either 250 mg PM or placebo of 100 mg maltodextrin each were taken twice daily for 6 weeks. Subjects were assessed for neuropsychological test, psychosocial status, and anthropometric at baseline, week 3, and week 6. Biomarkers were also determined at baseline and week 6.

    RESULTS: The supplementation of PM showed significant intervention effect on Digit Span test (P<0.05) social functioning domain of 36-Item Short Form Health Survey (P<0.05) among subjects with mood disturbance. While, among subjects with good mood, PM supplementation improved Wechsler Abbreviated Scale of Intelligence (WASI) for IQ verbal (P=0.016) and Full Scale IQ of WASI (P=0.004). There were no adverse effects reported for the supplementation as indicated using biomarkers, including liver function and clinical symptoms.

    CONCLUSION: Supplementation of PM is safe to be consumed for 6 weeks, with potential benefits to attention, short-term memory, improved quality of life, and mood, as well as IQ.

    Matched MeSH terms: Double-Blind Method
  16. Teng CL, Lim WY, Chua CZ, Teo RS, Lin KT, Yeo JC
    Aust Fam Physician, 2016;45(1):65-8.
    PMID: 27051992
    BACKGROUD: Previous studies have shown that the blood pressure elevating effect of acute caffeine consumption was variable because of the heterogeneity of study participants, dosage of caffeine and study designs.
    OBJECTIVE: This research aimed to examine the effect of a single cup of coffee on the blood pressure of young adults.
    METHODS: Normotensive adults were randomised to receive either a cup of caffeinated drink (intervention group) or a cup of decaffeinated drink (control group). The main outcome measure was mean change in systolic blood pressure (SBP) and diastolic blood pressure (DBP) between intervention and control groups.
    RESULTS: Enrolled participants (n = 104) were randomly assigned to the intervention group (n = 53) or the control group (n = 51). The mean differences in SBP and DBP of the two groups were +2.77 mmHg (P = 0.05) and +2.11 mmHg (P = 0.64), respectively. Therefore, the rise in both SBP and DBP after caffeine consumption was not statistically significant.
    DISCUSSION: Our study confirmed that drinking a single cup of coffee (containing 80 mg of caffeine) does not have a significant impact on the blood pressure of healthy normotensive young adults one hour after the drink.
    Matched MeSH terms: Double-Blind Method
  17. Erdogan A, Rao SS, Thiruvaiyaru D, Lee YY, Coss Adame E, Valestin J, et al.
    Aliment Pharmacol Ther, 2016 07;44(1):35-44.
    PMID: 27125883 DOI: 10.1111/apt.13647
    BACKGROUND: Fibre supplements are useful, but whether a plum-derived mixed fibre that contains both soluble and insoluble fibre improves constipation is unknown.

    AIM: To investigate the efficacy and tolerability of mixed soluble/insoluble fibre vs. psyllium in a randomized double-blind controlled trial.

    METHODS: Constipated patients (Rome III) received mixed fibre or psyllium, 5 g b.d., for 4 weeks. Daily symptoms and stool habit were assessed using stool diary. Subjects with ≥1 complete spontaneous bowel movement/week above baseline for ≥2/4 weeks were considered responders. Secondary outcome measures included stool consistency, bowel satisfaction, straining, gas, bloating, taste, dissolvability and quality of life (QoL).

    RESULTS: Seventy-two subjects (mixed fibre = 40; psyllium = 32) were enrolled and two from psyllium group withdrew. The mean complete spontaneous bowel movement/week increased with both mixed fibre (P < 0.0001) and psyllium (P = 0.0002) without group difference. There were 30 (75%) responders with mixed fibre and 24 (75%) with psyllium (P = 0.9). Stool consistency increased (P = 0.04), straining (P = 0.006) and bloating scores decreased (P = 0.02) without group differences. Significantly more patients reported improvement in flatulence (53% vs. 25%, P = 0.01) and felt that mixed fibre dissolved better (P = 0.02) compared to psyllium. QoL improved (P = 0.0125) with both treatments without group differences.

    CONCLUSIONS: Mixed fibre and psyllium were equally efficacious in improving constipation and QoL. Mixed fibre was more effective in relieving flatulence, bloating and dissolved better. Mixed fibre is effective and well tolerated.

    Matched MeSH terms: Double-Blind Method
  18. George A, Suzuki N, Abas AB, Mohri K, Utsuyama M, Hirokawa K, et al.
    Phytother Res, 2016 Apr;30(4):627-35.
    PMID: 26816234 DOI: 10.1002/ptr.5571
    This study was aimed to investigate the capacity of a standardized root water extract of Eurycoma longifolia (Tongkat Ali, TA), Physta® to modulate human immunity in a middle-aged Japanese population. This randomized, double-blind, placebo-controlled, parallel study was conducted for 4 weeks. Eighty-four of 126 subjects had relatively lower scores according to Scoring of Immunological Vigor (SIV) screening. Subjects were instructed to ingest either 200 mg/day of TA or rice powder as a placebo for 4 weeks [TA and Placebo (P) groups] and to visit a clinic in Tokyo twice (weeks 0 and 4). SIV, immunological grade, immunological age, and other immune parameters were measured. Eighty-three subjects completed the study; 40 in the TA group and 41 in the P group were statistically analyzed, whereas two were excluded from the analyses. At week 4, the SIV and immunological grade were significantly higher in the TA group than those in P group (p 
    Matched MeSH terms: Double-Blind Method
  19. Razali N, Md Latar IL, Chan YK, Omar SZ, Tan PC
    PMID: 26773246 DOI: 10.1016/j.ejogrb.2015.12.017
    OBJECTIVE: To evaluate the uterotonic effect of carbetocin compared with oxytocin in emergency cesarean delivery.

    STUDY DESIGN: Participants were randomized to intravenous bolus injection of 100mcg carbetocin or 10IU oxytocin after cesarean delivery of the baby. The primary outcome is any additional uterotonic which may be administered by the blinded provider for perceived inadequate uterine tone with or without hemorrhage in the first 24hours after delivery. Secondary outcomes include operating time, perioperative blood loss, change in hemoglobin and hematocrit levels, blood transfusion and reoperation for postpartum hemorrhage.

    RESULTS: Additional uterotonic rates were 107/276 (38.8%) vs. 155/271 (57.2%) [RR 0.68 95% CI 0.57-0.81 p<0.001; NNTb 6 95% CI 3.8-9.8], mean operating time 45.9±16.0 vs. 44.5±13.1minutes p=0.26, mean blood loss 458±258 vs. 446±281ml p=0.6, severe postpartum hemorrhage (≥1000ml) rates 15/276 (5.4%) vs. 10/271 (3.7%) p=0.33 and blood transfusion rates 6/276 (2.2%) vs. 10/271 (3.7%); p=0.30 for carbetocin and oxytocin arms respectively. There was only one case of re-operation (oxytocin arm). In the cases that needed additional uterotonic 98% (257/262) was started intraoperatively and in 89% (234/262) the only additional uterotonic administered was an oxytocin infusion over 6hours.

    CONCLUSION: Fewer women in the carbetocin arm needed additional uterotonics but perioperative blood loss, severe postpartum hemorrhage, blood transfusion and operating time were not different.

    Matched MeSH terms: Double-Blind Method
  20. Martineau AR, Hanifa Y, Witt KD, Barnes NC, Hooper RL, Patel M, et al.
    Thorax, 2015 Oct;70(10):953-60.
    PMID: 26063508 DOI: 10.1136/thoraxjnl-2015-206996
    RATIONALE: Low-dose vitamin D supplementation is already recommended in older adults for prevention of fractures and falls, but clinical trials investigating whether higher doses could provide additional protection against acute respiratory infection (ARI) are lacking.

    OBJECTIVE: To conduct a clinical trial of high-dose versus low-dose vitamin D3 supplementation for ARI prevention in residents of sheltered-accommodation housing blocks ('schemes') and their carers in London, UK.

    MEASUREMENTS AND METHODS: Fifty-four schemes (137 individual participants) were allocated to the active intervention (vitamin D3 2.4 mg once every 2 months +10 μg daily for residents, 3 mg once every 2 months for carers), and 54 schemes with 103 participants were allocated to control (placebo once every 2 months +vitamin D3 10 μg daily for residents, placebo once every 2 months for carers) for 1 year. Primary outcome was time to first ARI; secondary outcomes included time to first upper/lower respiratory infection (URI/LRI, analysed separately), and symptom duration.

    MAIN RESULTS: Inadequate vitamin D status was common at baseline: 220/240 (92%) participants had serum 25(OH)D concentration <75 nmol/L. The active intervention did not influence time to first ARI (adjusted HR (aHR) 1.18, 95% CI 0.80 to 1.74, p=0.42). When URI and LRI were analysed separately, allocation to the active intervention was associated with increased risk of URI (aHR 1.48, 95% CI 1.02 to 2.16, p=0.039) and increased duration of URI symptoms (median 7.0 vs 5.0 days for active vs control, adjusted ratio of geometric means 1.34, 95% CI 1.09 to 1.65, p=0.005), but not with altered risk or duration of LRI.

    CONCLUSIONS: Addition of intermittent bolus-dose vitamin D3 supplementation to a daily low-dose regimen did not influence risk of ARI in older adults and their carers, but was associated with increased risk and duration of URI.

    TRIAL REGISTRATION NUMBER: clinicaltrials.gov NCT01069874.

    Matched MeSH terms: Double-Blind Method
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