Table 1:

Comparison of Results from Primary and Sensitivity Analyses, Hazard Ratio for Intussusception by Rotavirus Vaccination Status (No Rotavirus Vaccination as Referent Category)^*

	Full rotavirus vaccination			Partial rotavirus vaccination
Analysis	HR**	95% CI	P value	HR**	95% CI	P value
Primary analysis	0.79	(0.57, 1.09)	0.13	0.89	(0.66, 1.19)	0.45
Sensitivity analyses
Excluding children born in states with universal rotavirus vaccination programs***	0.84	(0.59, 1.20)	0.32	0.91	(0.66, 1.24)	0.54
Including intussusception in only the first diagnostic position	0.70	(0.48, 1.03)	0.06	0.93	(0.65, 1.33)	0.67
Including only children receiving at least one dose of DTaP by the age of 6 months (model uses data from children surviving intussusception-free until at least 6 months of age)	0.70	(0.49, 1.01)	0.04	0.70	(0.45, 1.08)	0.10
Including intussusception in only the first diagnostic position and only children receiving at least one dose of DTaP by the age of 6 months (model uses data from children surviving intussusception-free until at least 6 months of age)	0.62	(0.41, 0.95)	0.02	0.85	(0.51, 1.41)	0.52

^*All rotavirus models adjust for year of birth and receipt of DTaP doses and use unvaccinated children as the referent. HR=Hazard Ratio.

^***2007 – 2012: Alaska, Idaho, Maine, Massachusetts, New Hampshire, New Mexico, North Dakota, Oregon, Rhode Island, Vermont, Washington, Wisconsin, Wyoming; 2013 – 2014: Connecticut, Idaho, Maine, Massachusetts, New Hampshire, New Mexico, Rhode Island, South Dakota, Vermont, Washington, Wyoming; 2015 – 2016: Alaska, Connecticut, Idaho, Maine, Massachusetts, New Hampshire, New Mexico, Rhode Island, Vermont, Washington, Wyoming.