Table 2.

Results of general estimating equation analysis by site of experiment as covariates

Site of experiment	Estimate	Standard error	Odds ratio	95% confidence interval
Full-Analysis group (n = 61)
Site 1	Reference	Reference	1.00	Reference
Site 2	−0.63	0.77	0.53	0.12−2.40
Site 3	−0.12	0.75	0.88	0.20−3.82
Site 4	0.90	0.41	2.47	1.10−5.54
Site 5	−0.36	0.74	0.70	0.16−2.99
Site 6	0.46	0.51	1.59	0.59−4.29
Per-Protocol group (n = 43)
Site 1	Reference	Reference	1.00	Reference
Site 3	−0.26	0.75	0.77	0.18−3.32
Site 4	0.72	0.42	2.06	0.91−4.67
Site 5	−0.77	0.59	0.46	0.14−1.48
Site 6	0.67	0.50	1.95	0.73−5.19