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Table 3 Clustering of active trachoma and C. trachomatis infection

From: The impact of a single round of community mass treatment with azithromycin on disease severity and ocular Chlamydia trachomatis load in treatment-naïve trachoma-endemic island communities in West Africa

 

Active trachoma

Ct infection

Cluster level

CEBaseline a (95% CI SE)

CEFollow-up 95% CI SE)

CEBaseline a (95% CI SE)

CEFollow-up (95% CI SE)

Household

1.08 (0.79–1.48)

0.89 (0.85–0.95)

1.35 (1.08–1.68)

1.52 (0.85–2.74)

Village

0.76 (0.50–1.14)

1.05 (0.56–1.96)

0.89 (0.65–1.21)

1.04 (0.56–1.96)

Island

0.47 (0.15–1.49)

0.34 (0.08–1.37)

0.42 (0.17–1.00)

0.19 (0.01–5.76)

  1. aCE, cluster estimates obtained from age-adjusted mixed effects regression models for active trachoma and Ct (C. trachomatis) infection at baseline and follow-up. 95% CI (confidence intervals) of the SE (standard error) are quoted. Mixed effects models including all three cluster levels showed household to have the strongest effect. All cluster estimates were significant at the 1% level (Wald Chi2)