Table 3. Effect modification by sex for the primary outcome (change in SBP)
Mean outcome (95% CI)a
Intervention
(clusters n = 13)		Control 
(clusters n = 13)		Crude effect (95% CI); P valuebAdjusted effect (95% CI); P value
Female change in SBP-25.62
(-30.49
 to -20.75)		-10.42
(-21.92 to 1.09)		15.20
(3.06 to 27.34); 0.02		13.32
(0.74 to 25.89); 0.04
Male change in SBP-24.64
(-29.33
 to -19.95)		-7.52
(-23.42 to 8.39)		17.13
(0.81 to 33.44); 0.04		17.51
(3.69 to 31.34); 0.02
Female–male
difference
for change in SBP		---1.93
(-12.38 to 8.53); 0.70		-0.50
(-9.27 to 8.27); 0.90

  • SBP = systolic blood pressure. aArm-specific mean outcomes and their 95% confidence intervals are themselves based on cluster-level summary mean outcomes for females/males/female–male differences. bAll control minus intervention differences (intervention effect estimates) are based on analysis of crude/covariate-adjusted cluster-level summary (mean/proportion) female–male difference outcomes. Change in SBP is calculated as outcome at endpoint minus outcome at baseline.