Table A1.

Sensitivity Analysis: Estimated IS Rates before vs. after RV Program Introduction 1) Overall, 2) In 2−<8 month-olds, 3) In 2−<6 month-olds, 4) In 2−<4 month-olds, 2003-2013.

Analysis		Estimate of Rate of IS (95% CI)	p-value for difference before versus after
Overall	Before	23.4 (21.5, 25.4)
	After	22.4 (18.3, 27.4)	0.70
2−<8 months-olds	Before	35.1 (32.0,38.7)
	After	31.9 (24.8, 41.0)	0.47
2−<6 month-olds	Before	34.3 (30.5, 38.7)
	After	31.6 (23.1, 43.1)	0.61
2−<4 month-olds	Before	31.5 (26.4, 37.5)
	After	27.6 (17.1, 44.5)	0.60