Table 1.

Patients' Health Conditions and Vaccine Indications

Risk Factor	Cases (n=100)	Controls (n=386)	Total (n=486)	OR	95% CI	P Value
Total number of vaccine indications, mean, range	1.52 (1 to 4)	1.59 (1 to 4)	1.57 (1 to 4)	0.84*	0.61 to 1.16	.30
Had additional chronic health problems†	87 (87.0)	338 (87.6)	425 (87.5)	0.95	0.49 to 1.83	.88
Total number of additional chronic health problems†, mean, range	1.05 (0 to 3)	1.05 (0 to 3)	1.05 (0 to 3)	0.99‡	0.67 to 1.45	.95
Smoking, any in past year vs none in past year (39§/138∥)	27 (69.2)	89 (60.5)	116 (65.5)	1.24	0.58 to 2.66	.58

Data are no. (%) with indicated risk factor, if not stated otherwise.

^*OR per indication.

^†Additional chronic health problems included psychiatric problems, obesity, hypertension, autoimmune disease, non-ETOH substance abuse, and cancers other than indications for vaccination.

^‡OR per additional chronic health problem.

^§Number of cases for whom risk factor data were available.

^∥Number of controls for whom risk factor data were available.

OR, odds ratio; CI, confidence interval.