Table 2.

The results of the sensitivity analyses between the different baseline adjustment methods

Statistical method	Mean group difference	95% CI	P-value
ANCOVA with baseline as covariate	−3.9	−9.5, 1.6	0.15
Posttreatment	−4.3	−9.8, 1.2	0.12
Change score	−3.0	−9.9, 3.8	0.38
Percent change score	−0.019	−0.087, 0.050	0.58

Note: Multiple imputation, with five iterations, was used for all the analyses (m=5).

Abbreviations: ANCOVA, analysis of covariance; CI, confidence interval.