Table 4.

Odds ratios of adherence by severity of airflow limitation in subjects with diabetes (adjusted)^*

Medication	n	Overall Test of Trend		50% ≤ FEV1 < 80%†		30% ≤ FEV1 < 50%†		FEV1 < 30%†
		OR	P Value	OR	P Value	OR	P Value	OR	P Value
		(95% CI)		(95% CI)		(95% CI)		(95% CI)
Metformin	1,440	0.87	0.068	0.93	0.544	0.77	0.143	0.64	0.142
		(0.76, 1.01)		(0.73, 1.18)		(0.54, 1.09		(0.35, 1.16)
Sulfonylureas	1,554	0.88	0.060	1.01	0.951	0.86	0.365	0.52	0.026
		(0.76, 1.01)		(0.79, 1.29)		(0.62, 1.20)		(0.29, 0.92)

Definition of abbreviations: CI = confidence interval; OR = odds ratio.

Bold typeface indicates statistical significance.

^*Referent group is subjects with FEV₁ ≥ 80% predicted.

^†FEV₁ values are expressed as a percentage of the predicted value.