. 2015 May 27;181(12):1008–1017. doi: 10.1093/aje/kwv010

Table 6.

Sensitivity Analysis of the Tail Completion Method for Data From the IPTi Study in Navrongo, Ghana, 2000–2004

Model No.	Model Description	Effect Estimated	Zero Tail Completion				Weibull Tail Completion
Model No.	Model Description	Effect Estimated	HR	95% CI	OR^a	95% CI	HR	95% CI	OR^a	95% CI
5	IPTi, frailty, nonsusceptible fraction	Total	0.84	0.77, 0.92	0.69	0.64, 0.74	0.65	0.58, 0.74	10.2	9.41, 11.0
7	IPTi, frailty, nonsusceptible fraction, adjusted for event dependence^b	Primary	0.79	0.73, 0.87	0.69	0.64, 0.74	0.66	0.60, 0.73	3.32	3.32^c
8	IPTi, frailty, nonsusceptible fraction, covariates^d	Total	0.84	0.77, 0.92	0.68	0.64, 0.74	0.71	0.64, 0.78	1.29	1.28, 1.29
10	IPTi, frailty, nonsusceptible fraction, covariates^d, adjusted for event dependence^b	Primary	0.78	0.71, 0.85	0.68	0.63, 0.73	0.72	0.66, 0.79^e	1.23	1.22, 1.24^e

Abbreviations: CI, confidence interval; HR, hazard ratio; IPTi, intermittent preventive treatment in infants; OR, odds ratio.

^a The odds ratio is the relative change in the odds of being susceptible due to the intervention.

^b Event dependence occurs when the primary effect is estimated by stratifying on event order.

^c Standard error not estimated; CI is not presented.

^d Covariates consist of sex, place of residence, and season of birth.

^e Model did not fully converge.