Table 3.

Simple correlation coefficients (r) and standard regression coefficients by hierarchical stepwise multiple regression (β) between baseline variables and HbA_1c at baseline of patients with type 2 diabetes (n = 304).

			Hierarchical stepwise regression analysis
	Simple correlation		Model 1		Model 2		Model 3
Baseline variables	r	P	β	P	β	P	β	P
Sex (male = 1, female = 0)	-0.047	0.148	-	-	-	-	-	-
Age	-0.311	<0.001	-0.316	<0.001	-0.296	<0.001	-0.295	<0.001
Duration of illness	0.051	0.376	-	-	-	-		-
Treatment regimen (diet only = 1, medication = 0)	-0.249	<0.001	-0.177	0.001	-0.155	0.005	-0.157	0.005
No. of microvascular complications of diabetes	0.168	<0.001	0.177	0.001	0.170	0.003	0.163	0.003
DTSQ	-0.219	<0.001	NI	NI	-0.120	0.030	NI	NI
W-BQ12	-0.125	0.030	NI	NI	-	-	-	-
PAID	0.220	<0.001	NI	NI	NI	NI	0.131	0.017
SES	-0.030	0.607	NI	NI	-	-	-	-
Social Support Scale	-0.052	0.367	NI	NI	-	-	-	-
Self-Efficacy Scale	-0.187	<0.001	NI	NI	-	-	-	-
Adjusted R2			0.164		0.178		0.178
F			20.8	<0.001	17.2	<0.001	17.2	<0.001

Medication, oral hypoglycemic agents, or insulin, or insulin plus oral hypoglycemic agents. DTSQ, Diabetes Treatment Satisfaction Questionnaire; W-BQ12, Well-being Questionnaire12; PAID, Problem Areas in Diabetes Scale; SES, Self-Esteem Scale. Each measure is detailed in the footnotes of Table 1. R², multiple coefficient of determination. NI, not included. Model 1, adjusted for sex, age, duration of illness, treatment regimen, number of microvascular complications of diabetes; Model 2, adjusted for Model 1 and DTSQ, W-BQ12, SES, Social Support Scale, Self-Efficacy Scale; Model 3, adjusted for Model 1 and W-BQ12, PAID, SES, Social Support Scale, Self-Efficacy Scale.