. 2022 Sep 28;10(5):e002927. doi: 10.1136/bmjdrc-2022-002927

Table 3.

Regression model using SCS total score (step 3a) or subscales (3b), with Diabetes Distress Scale as outcome variable

Predictor variable	Block	r²	F(df)	Multivariate analyses
Predictor variable	Block	r²	F(df)	B	β	t	p	r	pr²	sr²
		0.25	16.28 (7,344)
Age	1			−0.03	−0.28	−4.30	<0.001*	−0.37	0.05	0.04
Sex	1			−0.12	−0.06	−1.35	0.177	−0.12	0.01	<0.01
Ethnicity	1			−0.07	−0.15	−3.03	0.003*	−0.19	0.03	0.02
BMI	1			0.02	0.13	2.57	0.011*	0.20	0.02	0.01
Age of diabetes onset	1			<0.01	0.03	0.52	0.603	−0.29	<0.01	<0.01
HbA1c	1			0.24	0.27	5.54	<0.001*	0.29	0.08	0.07
IMD	1			<−0.01	−0.08	−1.52	0.129	−0.19	0.01	0.01
		0.32	16.35 (10,341)
Age	2			−0.03	−0.29	−4.58	<0.001*	−0.37	0.06	0.04
Sex	2			−0.12	−0.06	−1.42	0.155	−0.12	0.01	<0.01
Ethnicity	2			−0.08	−0.18	−3.73	<0.001*	−0.19	0.04	0.03
BMI	2			0.01	0.09	1.76	0.079	0.20	0.01	0.01
Age of diabetes onset	2			<0.01	0.06	0.89	0.372	−0.29	<0.01	<0.01
HbA1c	2			0.23	0.26	5.55	<0.001*	0.29	0.08	0.06
IMD	2			<−0.01	−0.06	−1.20	0.230	−0.19
Daytime sleepiness (ESS)	2			0.05	0.28	6.02	<0.001*	0.31	0.10	0.07
Sleep duration (min)	2			<0.01	−0.02	−0.35	0.729	−0.15	<0.01	<0.01
Social jetlag	2			<−0.01	<−0.01	−0.13	0.894	−0.04	<0.01	<0.01
		0.40	20.43 (11,340)
Age	3a			−0.02	−0.23	−3.85	<0.001*	−0.37	0.04	0.03
Sex	3a			−0.07	−0.04	−0.93	0.353	−0.12	<0.01	<0.01
Ethnicity	3a			−0.07	−0.17	−3.69	<0.001*	−0.19	0.04	0.02
BMI	3a			0.01	0.06	1.24	0.215	0.20	<0.01	<0.01
Age of diabetes onset	3a			<0.01	0.04	0.62	0.533	−0.29	<0.01	<0.01
HbA1c	3a			0.18	0.21	4.57	<0.001*	0.29	0.06	0.04
IMD	3a			<−0.01		−1.21
Daytime sleepiness (ESS)	3a			0.04	0.21	4.73	<0.001*	0.31	0.06	0.04
Sleep duration (min)	3a			<0.01	−0.03	−0.59	0.555	−0.15	<0.01	<0.01
Social jetlag	3a			<0.01	<−0.01	−0.07	0.948	−0.04	<0.01	<0.01
SCS overall	3a			−0.39	−0.30	−6.46	<0.001*	−0.46	0.11	0.07
		0.50	20.58 (16,335)
Age	3b			−0.02	−0.18	−3.13	0.002*	−0.37	0.03	0.01
Sex	3b			<−0.01	−0.01	−0.19	0.850	−0.12	<0.01	<0.01
Ethnicity	3b			−0.06	−0.14	−3.26	0.001*	−0.19	0.03	0.02
BMI	3b			0.01	0.04	1.04	0.301	0.20	<0.01	<0.01
Age of diabetes onset	3b			<0.01	0.05	0.85	0.395	−0.29	<0.01	<0.01
HbA1c	3b			0.13	0.15	3.46	<0.001*	0.29	0.03	0.02
IMD	3b			<−0.01	−0.09	−2.07	0.039*	−0.19	0.01	0.01
Daytime sleepiness (ESS)	3b			0.03	0.16	3.68	<0.001*	0.31	0.04	0.02
Sleep duration (min)	3b			<0.01	0.02	0.05	0.959	−0.15	<0.01	<0.01
Social jetlag	3b			<0.01	<0.01	<0.01	0.997	−0.04	<0.01	<0.01
SCS subscales
Self-kindness	3b			−0.06	−0.07	−1.19	0.234	−0.08	<0.01	<0.01
Self-judgment	3b			0.09	0.10	1.50	0.134	0.54	0.01	<0.01
Common humanity	3b			0.01	0.01	0.17	0.866	0.12	<0.01	<0.01
Isolation	3b			0.12	0.15	2.19	0.030*	0.58	0.01	0.01
Mindfulness	3b			0.06	0.07	1.00	0.317	−0.06	<0.01	<0.01
Overidentified	3b			0.22	0.27	3.77	<0.001*	0.60	0.04	0.02

*Significance at p<0.05 or better.

BMI, body mass index; ESS, Epworth Sleepiness Scale; HbA1c, hemoglobin A1c; IMD, index of multiple deprivation; pr², squared partial correlation; r, zero order correlation; SCS, Self-Compassion Scale; sr², squared semi-partial correlation.