Table 2. Odds ratios for active trachoma and ocular Chlamydia by normalized rank order.

Village	Active trachoma*	Ocular Chlamydia #	OR for ocular Chlamydia based on normalized rank order (95% CI)
A	19.0 (8.6 to 29.4)	8.6 (1.2 to 16.0)	0.03 (0.0005 to 1.97)
B	20.2 (13.0 to 27.3)	26.6 (18.1 to 34.5)	0.18 (0.04 to 0.75)
C	38.3 (31.4 to 45.1)	27.6 (21.2 to 33.9)	0.31 (0.10 to 0.99)
D	18.1 (12.4 to 23.8)	11.8 (7.1 to 16.7)	0.66 (0.13 to 3.37)
Mean 4 villages	23.9 (8.5 to 39.2)	18.7 (3.0 to 34.3)	0.27 (0.13 to 0.59)

^*Trachomatous inflammation follicular (TF) according to WHO simplified trachoma grading system [6].

^#Amplicor PCR (Roche Diagnostics, Branchburg, NJ, USA).

Community means (95% CI).