K Viney1,2, J Cavanaugh3, T Kienene4, D Harley2, P M Kelly5,6, A Sleigh2, J O'Connor7, S Mase3. 1. Public Health Division, Secretariat of the Pacific Community, Noumea, New Caledonia. 2. National Centre for Epidemiology and Population Health, Australian National University, Canberra, ACT, Australia. 3. Division of TB Elimination, United States Centers for Disease Control and Prevention, Atlanta, GA, USA. 4. National TB Programme, Ministry of Health and Medical Services, Tarawa, Kiribati. 5. Population Health Division, ACT Health Directorate, Canberra, ACT, Australia. 6. Australian National University Medical School, Canberra, ACT, Australia. 7. Public Health Consultant, Auckland, New Zealand.
Abstract
OBJECTIVES: To better inform local management of TB-diabetes collaborative activities, we aimed to determine the prevalence of diabetes among persons with and without TB and to determine the association between TB and diabetes in Kiribati, a Pacific Island nation. METHODS: We compared consecutively enrolled TB cases to a group of randomly selected community controls without evidence of TB. Diabetes was diagnosed by HbA1c, and clinical and demographic data were collected. A tuberculin skin test was administered to controls. The chi-square test was used to assess significance in differences between cases and controls. We also calculated an odds ratio, with 95% confidence intervals, for the odds of diabetes among cases relative to controls. Unweighted multivariate logistic regression was performed to adjust for the effects of age and sex. RESULTS: A total of 275 TB cases and 499 controls were enrolled. The diabetes prevalence in cases (101, 37%) was significantly greater than in controls (94, 19%) (adjusted odds ratio: 2.8; 95% CI 2.0-4.1). Fifty-five percent (108) of all diabetic diagnoses were new; this proportion was higher among controls (64.8%) than cases (46.5%). Five patients with TB were screened to detect one patient with diabetes. CONCLUSIONS: There is a strong association between TB and diabetes in Kiribati and bidirectional screening should be conducted in this setting.
OBJECTIVES: To better inform local management of TB-diabetes collaborative activities, we aimed to determine the prevalence of diabetes among persons with and without TB and to determine the association between TB and diabetes in Kiribati, a Pacific Island nation. METHODS: We compared consecutively enrolled TB cases to a group of randomly selected community controls without evidence of TB. Diabetes was diagnosed by HbA1c, and clinical and demographic data were collected. A tuberculin skin test was administered to controls. The chi-square test was used to assess significance in differences between cases and controls. We also calculated an odds ratio, with 95% confidence intervals, for the odds of diabetes among cases relative to controls. Unweighted multivariate logistic regression was performed to adjust for the effects of age and sex. RESULTS: A total of 275 TB cases and 499 controls were enrolled. The diabetes prevalence in cases (101, 37%) was significantly greater than in controls (94, 19%) (adjusted odds ratio: 2.8; 95% CI 2.0-4.1). Fifty-five percent (108) of all diabetic diagnoses were new; this proportion was higher among controls (64.8%) than cases (46.5%). Five patients with TB were screened to detect one patient with diabetes. CONCLUSIONS: There is a strong association between TB and diabetes in Kiribati and bidirectional screening should be conducted in this setting.
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