Table 3.

Primary and Secondary Outcomes

	Odds ratio (95%CI) how vs usual care	Odds ratio (95%CI) why vs usual care	Odds ratio (95%CI) why vs how
Vaccination from intervention delivery through scheduled visit (primary outcome)
Intention-to-treat analysis
Unadjusted	0.87 (0.67 to 1.14)	1.01 (0.81 to 1.28)	1.20 (0.96 to 1.51)
Adjusted	0.88 (0.68 to 1.15)	1.04 (0.82 to 1.32)	1.22 (0.97 to 1.54)
Sensitivity analysis
Unadjusted	0.91 (0.70 to 1.18)	0.90 (0.69 to 1.18)	1.01 (0.78 to 1.32)
Adjusted	0.91 (0.70 to 1.19)	0.91 (0.69 to 1.20)	1.02 (0.79 to 1.33)
Vaccination through 6 weeks after intervention delivery (secondary outcome)
Intention-to-treat analysis
Unadjusted	0.83 (0.67 to 1.01)	1.03 (0.87 to 1.23)	1.26 (1.06 to 1.49)
Adjusted	0.83 (0.68 to 1.01)	1.05 (0.88 to 1.25)	1.26 (1.07 to 1.50)
Sensitivity analysis
Unadjusted	0.82 (0.65 to 1.04)	0.96 (0.78 to 1.18)	1.20 (0.95 to 1.53)
Adjusted	0.82 (0.65 to 1.05)	0.97 (0.78 to 1.20)	1.21 (0.94 to 1.54)

All analyses are adjusted for clustering of patients within clinic day and clinic. The adjusted analyses also adjust for race, sex, and ethnicity. Sensitivity analyses include only patients who were retrospectively eligible for booster at the time of randomization (N = 2045)

Abbreviation: CI confidence interval