ArticleBMC infectious diseases2026
Age-stratified epidemiological and clinical predictors of laboratory-confirmed measles among suspected cases in Diyarbakır, Türkiye (2012-2024): a test-negative case-control study.
Article in BMC infectious diseases, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundMeasles elimination remains elusive in many countries, and resurgences occur even in previously controlled settings. We assessed age-specific clinical and epidemiological factors associated with laboratory-confirmed measles among suspected cases.
methodsIn this test-negative case-control study, we analyzed surveillance data from Diyarbakır, Türkiye (2012-2024). Cases and controls were defined by measles-specific IgM results. Cases were stratified into two age groups, individuals aged ≤ 1 year and individuals aged > 1 year, with controls selected using systematic sampling at a case-control ratio of 1:3. Univariable and multivariable logistic regression analyses estimated odds ratios (ORs) for demographic factors, vaccination status, seasonality, epidemic year, clinical symptoms, and hospitalization.
resultsAmong 3,868 individuals (967 cases, 2,901 controls), 32% of cases were ≤ 1 year of age. In infants, predictors included hospitalization (OR: 7.95; 95% CI:4.21-15), upper respiratory tract symptoms (OR: 3.20; 95% CI:1.87-5.48), age 7-9 months (OR: 4.16; 95% CI:2.33-7.41) and 10-12 months (OR: 5.28; 95% CI:3.03-9.20), and spring-summer season (OR: 2.08; 95% CI:1.14-3.82). Among individuals aged > 1 year, significant predictors were receipt of a single dose (OR: 3.64; 95% CI:1.09-12.15); being unvaccinated (OR: 16.13; 95% CI:4.77-54.54) or having unknown vaccination status (OR: 17.26; 95% CI:5.14-57.88); epidemic year (OR: 4.06; 95% CI:2.74-6.02); spring-summer season (OR: 1.80; 95% CI:1.21-2.69); fever (OR: 1.89; 95% CI:1.20-2.95); and hospitalization (OR: 2.24; 95% CI:1.39-3.62).
conclusionAmong suspected cases, age-specific predictors of laboratory-confirmed measles may support clinical suspicion, surveillance alertness, and prioritization of laboratory testing when interpreted alongside the local epidemiological context, including seasonality, vaccination coverage, and individual vaccination status. These findings may help guide regionally tailored surveillance and control efforts.
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