Association between oral 5-ASA adherence and health care utilization and costs among patients with active ulcerative colitis

Table 2 Association between 5-ASA adherence and all-cause health care utilization during 12-month period following 5-ASA initiation

Dependant Variable	Incident Rate Ratio^a	Confidence Interval		PValue
Number of inpatient admissions	0.6928	0.5461	0.8789	0.0025
Number of ER visits	0.6584	0.5077	0.8538	0.0016
Number of outpatient office visits	1.0004	0.9200	1.0878	0.9925
Number of other outpatient/ ancillary visits	0.9306	0.8587	1.0086	0.0798
Number of pharmacy prescriptions	1.2503	1.1624	1.3448	< .0001
Number of UC-related pharmacy prescriptions	1.7095	1.6258	1.7974	< .0001
Number of non–UC-related pharmacy prescriptions	0.9989	0.8862	1.1258	0.9852
Number of non-pharmacy visits	0.9605	0.8937	1.0322	0.2725
Number of total visits	1.1294	1.0595	1.2039	0.0002

5-ASA = 5-aminosalicylate; ER = emergency department; UC = ulcerative colitis.
^aIncident rate ratios are based on Poisson regression models and show utilization among adherent patients compared to nonadherent patients. All models control for age, gender, geographic region, health plan type, payer type, and Charlson Comorbidity Index scores.

ISSN: 1471-230X