TABLE 2.

Relative Number of Postintervention Outcomes for Intervention Groups Versus Their Matched Control Groups^a

Phone Intervention vs Matched Control
Outcome (model)	All ages	<65 Years	≥65 Years
ED visits (Poisson, all variablesb	0.92 (0.77–1.10) P = .36	1.13 (0.87–1.46) P = .37	0.78 (0.62–0.99)c P = .04
Days with AACC calls (normal, without age and LAPS2)	0.93 (0.68–1.27) P = .63	0.98 (0.66–1.46) P = .92	0.86 (0.52–1.41) P = .54
Outpatient visits (normal, without age and LAPS2)	1.61 (0.67–3.89) P = .29	1.89 (0.53–6.78) P = .33	1.34 (0.41–4.31) P = .63
Mail Intervention vs Matched Control
Outcome (model)	All ages	<65 Years	≥ 65 Years
ED visits (Poisson, all variablesb)	1.07 (0.92–1.23) P = .40	0.73 (0.55–0.98)c P = .03	1.12 (0.95–1.33) P = .18
Days with AACC calls (normal, without age and LAPS2)	0.83 (0.60–1.13) P = .23	0.77 (0.49–1.20) P = .25	0.85 (0.57–1.27) P = .42
Outpatient visits (normal, without age, LAPS2, and COPS2)	1.13 (0.49–2.62) P = .77	1.59 (0.25–9.74) P = .62	0.93 (0.38–2.29) P = .88

AACC indicates Appointment and Advice Call Center; COPS2, COmorbidity Point Score, version 2; ED, emergency department; LAPS2, Laboratory-based Acute Physiology Score, version 2.

^aRelative visit/utilization rates with 95% CIs and P values are presented.

^bAll variables include age, sex, COPS2 score, Charlson Comorbidity Index score, LAPS2 score, and intervention type.

^cValues that were found to be significant in each of the 2 intervention groups compared with their matched controls are in bold.