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  1. Mahadeva S, Chan WK, Mohazmi M, Sujarita R, Goh KL
    J Gastroenterol Hepatol, 2011 Nov;26(11):1669-76.
    PMID: 21649731 DOI: 10.1111/j.1440-1746.2011.06806.x
    BACKGROUND AND AIM:
    Outcome measures for clinical trials in dyspepsia require an assessment of symptom response. There is a lack of validated instruments assessing dyspepsia symptoms in the Asian region. We aimed to translate and validate the Leeds Dyspepsia Questionnaire (LDQ) in a multi-ethnic Asian population.

    METHODS:
    A Malay and culturally adapted English version of the LDQ were developed according to established protocols. Psychometric evaluation was performed by assessing the validity, internal consistency, test-retest reliability and responsiveness of the instruments in both primary and secondary care patients.

    RESULTS:
    Between April and September 2010, both Malay (n=166) and Malaysian English (n=154) versions were assessed in primary and secondary care patients. Both language versions were found to be reliable (internal consistency was 0.80 and 0.74 (Cronbach's α) for Malay and English, respectively; spearman's correlation coefficient for test-retest reliability was 0.98 for both versions), valid (area under receiver operating curve for accuracy of diagnosing dyspepsia was 0.71 and 0.77 for Malay and English versions, respectively), discriminative (median LDQ score discriminated between primary and secondary care patients in Malay (11.0 vs 20.0, P<0.0001) and English (10.0 vs 14.0, P=0.001), and responsive (median LDQ score reduced after treatment in Malay (17.0 to 14.0, P=0.08) and English (18.0 to 11.0, P=0.008) to dyspepsia.

    CONCLUSIONS:
    The Malaysian versions of the LDQ are valid, reliable and responsive instruments for assessing symptoms in a multi-ethnic Asian population with dyspepsia.
  2. Leow HR, Ching SM, Sujarita R, Yap CF, Chia YC, Ho SH, et al.
    J Dig Dis, 2014 Nov;15(11):591-6.
    PMID: 25139629 DOI: 10.1111/1751-2980.12183
    OBJECTIVE:
    To develop and validate a Mandarin version of the Leeds Dyspepsia Questionnaire (M-LDQ) in Asian patients with dyspepsia.

    METHODS:
    The M-LDQ was developed according to standardized methods. The validity, internal consistency, test-retest reliability and responsiveness of the instrument were evaluated in both primary and secondary care patients.

    RESULTS:
    A total of 184 patients (mean age 54.0 ± 15.8 years, of whom 59% were women and 72.3% of whom had at least secondary level education) were recruited between August 2012 and March 2013, from both primary (n = 100) and secondary care clinics (n = 84). Both the internal consistency of all components of the M-LDQ (Cronbach's α 0.79) and test-retest reliability (Spearman's correlation coefficient 0.78) were good. The M-LDQ was valid in diagnosing dyspepsia in primary care (area under the receiver operating characteristics curve 0.84) and was able to discriminate between secondary and primary care patients (median cumulative LDQ score 13.0 vs 3.0, P < 0.0001). Among eight patients with organic dyspepsia, the median M-LDQ score reduced significantly from 21.0 (pretreatment) to 9.5 (4 weeks post-treatment) (P < 0.0001).

    CONCLUSION:
    The M-LDQ is a valid and responsive instrument for assessing ethnic Chinese adults with dyspepsia.

    KEYWORDS:
    Mandarin; ethnic Chinese; functional dyspepsia; outcome measure; questionnaire; validation
  3. Tai ML, Norhatta N, Goh KJ, Moy FM, Sujarita R, Asraff AA, et al.
    PLoS One, 2015;10(1):e0115838.
    PMID: 25629323 DOI: 10.1371/journal.pone.0115838
    BACKGROUND: Dyspepsia and headache frequently co-exist, but the clinical implication of this association is uncertain. We planned to examine the prevalence and impact of dyspepsia in adults with headache.
    METHODS: A cross-sectional study was conducted in a secondary care setting. Clinical, psychological and health-related quality of life (HRQOL) data were compared between subjects with headache and controls (non-headache subjects). The impact of dyspepsia was analysed further in subjects with headache alone.
    RESULTS: 280 subjects (93 cases with headache and 187 matched controls) were recruited. The following baseline characteristics of subjects were as follows: mean age 45.0 ± 17.3 years, 57.0% females and ethnic distribution-Malaysian = 45 (48.4%), Chinese n = 24 (25.8%) and Indians n = 24 (25.8%). Headache sub-types among cases with headache were as follows: tension-type headache (TTH) n = 53 (57.0%) and migraine n = 40 (43.0%). Dyspepsia was more prevalent in cases with headache compared to controls (25.8% vs 12.8%, p = 0.011), and headache was independently associated with dyspepsia (OR 2.75, 95% CI 1.39-5.43). Among cases with headache, there was a trend towards a higher prevalence of dyspepsia in those with migraine (27.5%) compared to TTH (24.5%). Subjects with headache and dyspepsia, compared to those with headache alone, had a greater severity of headache symptoms (63.67 ± 22.85 mm vs 51.20 ± 24.0 mm VAS, p = 0.029). Overall HRQOL scores were lower in headache subjects with dyspepsia (EQ-5D summary score 0.82 ± 0.18 vs 0.90 ± 0.16, p = 0.037 and EQ-5D VAS 62.08 ± 17.50 mm vs 72.62 ± 18.85 mm, p = 0.018), compared to those without dyspepsia.
    CONCLUSION: Dyspepsia is associated with more severe headache symptoms and results in a lower HRQOL in patients with headache.
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