Table 3.

Logistic Models for Chronic Obstructive Pulmonary Disease Hospitalization at Each Time Point

Time Point	Odds Ratio for COPD Hospitalization in Intervention Arm Compared with Control Arm	95% Confidence Interval	P Value for a Difference Between the Intervention and Control Arms
1 mo	0.092	0.011–0.769	0.0276
3 mo	0.371	0.150–0.916	0.0315
6 mo	0.430	0.196–0.940	0.0344
12 mo	0.600	0.300–1.203	0.1502

Definition of abbreviation: COPD = chronic obstructive pulmonary disease.

Models were adjusted for age, lung function (FEV₁), level of breathlessness (modified Medical Research Council dyspnea scale), and the number of hospitalizations in the year before baseline.