Table 4.

Linear regression and analysis of covariance for spirometry adherence.

Patient subgroups	Slope, %/month (95% CI)	Intercept, % (95% CI)	P value
Male patients	1.81 (0.05 to 3.57)	55.02 (45.64 to 64.41)	.88
Female patients	1.53 (–2.31 to 5.38)	48.40 (27.86 to 68.93)	—a
Hospital-based patients	1.67 (0.19 to 3.14)	75.71 (67.85 to 83.58)	<.001
Community-based patients	–1.84 (–3.00 to –0.68)	35.06 (28.87 to 41.26)	—

^aIndicates data is not applicable.