Supplementary Table 6.

Association Between Demographic Variables at Birth and Clinical Events in the First Year of Life (Infections Excluding Viral Infections, Gastrointestinal Illnesses, Failure to Thrive, and Hospital Readmission) and the Development of Inflammatory Bowel Disease, at Any Age Among All Persons With Inflammatory Bowel Disease Compared With Controls

Effect	Comparison	OR estimate	95% Wald confidence limits	P value
Bacterial infect only	Yes vs no	1.10	0.94, 1.30	.24
Q1	NF vs Q1	0.75	0.36, 1.54	.43
Q2	Q2 vs Q1	1.31	1.02, 1.68	.04
Q3	Q3 vs Q1	1.09	0.84, 1.42	.51
Q4	Q4 vs Q1	1.37	1.06, 1.77	.02
Q5	Q5 vs Q1	1.35	1.01, 1.79	.04
Geography	Rural vs urban	0.91	0.72, 1.15	.43
Apgar 1 min	7+ vs <7	1.10	0.87, 1.39	.44
Apgar 5 min	7+ vs <7	1.06	0.49, 2.31	.88
ICU admission	No vs yes	1.07	0.64, 1.79	.79
Gestational age	—	1.002	0.95, 1.06	.93
Birth weight	—	1.000	1.000, 1.000	.82
Readmitted in year 1	No vs yes	1.20	0.93, 1.54	.16
Cesarean section	Yes vs no	1.06	0.86, 1.32	.58
Maternal IBD	Yes vs no	4.57	3.11, 6.73	<.001
Hospitalization for GI	Yes vs no	0.78	0.45, 1.35	.38

GI, gastrointestinal; ICU, intensive care unit; Q, quintile.