TABLE 3.

Unadjusted and Adjusted IRRs for Constipation Provider Visits

	Unadjusted IRR	Adjusted IRR
ADHD	2.79 (2.52–3.08)	3.39 (2.59–4.43)
Boys versus girls	0.94 (0.89–0.99)	0.77 (0.68–0.90)
Age	0.82 (0.81–0.83)	0.73 (0.69–0.77)
Junior enlisted versus higher military rank	2.04 (1.79–2.33)	0.83 (0.69–1.01)
Firstborn child	1.24 (1.17–1.32)	1.31 (1.15–1.49)
Married parents	1.71 (1.54–1.89)	1.88 (1.41–2.49)

Unadjusted and adjusted IRRs were calculated by using random-effects Poisson regression modeling. The adjusted model included all variables listed in the table. Firstborn child and married status of parents were included in the model to adjust for increased health care use seen in these groups.