Table 2.

Adjusted odds ratios for change in MPR ≥20% stratified by insulin use during study

	No insulin use (n = 385)		Insulin use (n = 141)
	OR (95% CI)*	P	OR (95% CI)*	P
Print	Reference		Reference
0–5 Calls†	1.0 (0.4–2.8)	0.98	0.3 (0.0–2.8)	0.29
6–8 Calls	1.9 (1.0–3.5)	0.04	0.6 (0.2–2.1)	0.41
9–10 Calls	2.6 (1.4–4.6)	0.002	0.4 (0.3–2.2)	0.61
Call linear trend		0.001		0.88
Baseline MPR	0.04 (0.02–1.3)	<0.001	0.01 (0.001–0.10)	<0.001
Age (years)	1.0 (1.0–1.0)	0.81	0.9 (0.9–1.0)	0.03
Male	0.9 (0.6–1.6)	0.81	1.0 (0.4–2.6)	>0.99
Telephone	2.0 (1.2–3.2)	0.005	0.6 (0.3–1.5)	0.28

*Odds ratio (OR) (95% CI) estimated with binary logistic regression models.

†Call categories for the telephone intervention with print as reference. Linear trend is across the categories. Telephone gives the overall odds ratio (irrespective of number of calls) with print as reference, estimated in separate adjusted models.