Table 8.

Multiple logistic regression analysis, analysis of conditional maximum likelihood estimates, step 6

Analysis of conditional maximum likelihood estimates
Parameter	DF	Estimate	Standard error	Wald chi-Square	p value	aORa	95% Wald confidence limits
Rotavirus life vaccine dose 1	1	0.8739	0.3403	6.5959	0.0102	5.742	1.513	21.794
Breastfeeding at the month of index date*	1	−0.3122	0.1269	6.0531	0.0139	0.536	0.326	0.881
Family history of intussusception	1	0.5902	0.2802	4.4359	0.0352	3.256	1.085	9.767

DF degrees of freedom; aOR adjusted odds ratio; *index date cases: date of symptom onset, controls: day of life on which the matching case experienced first symptoms of intussusception; ^amatched by gender, date of birth (± 30 calendar days), federal state, and place of residence (first digit of the zip code).