Table 3.

Linear regression models, HRQoL

	Physical summary score of the SF-12			Mental summary score of the SF-12
	Beta	95%-CI	p-value	Beta	95%-CI	p-value
Univariate model	n = 660			n = 660
No thoughts	0.00			0.00
Low frequency and negative thoughts	−9.56	[−11.64; −7.47]	< 0.001	−9.52	[−11.42; −7.63]	< 0.001
Low frequency and positive thoughts	−4.22	[−6.14; −2.30]	< 0.001	−2.10	[−3.84; −0.36]	0.018
High frequency and negative thoughts	−14.65	[−17.09; −12.21]	< 0.001	−16.88	[−19.10; −14.67]	< 0.001
High frequency and positive thoughts	−12.67	[−16.95; −8.40]	< 0.001	−11.11	[−14.99; −7.23]	< 0.001
Multivariate modela	n = 624			n = 624
No thoughts	0.00			0.00
Low frequency and negative thoughts	−8.96	[−11.00; −6.93]	< 0.001	−9.20	[−11.15; −7.25]	< 0.001
Low frequency and positive thoughts	−3.56	[−5.43; −1.70]	< 0.001	−2.02	[−3.82; −0.23]	0.027
High frequency and negative thoughts	−14.25	[−16.75; −11.75]	< 0.001	−15.57	[−17.98; −13.17]	< 0.001
High frequency and positive thoughts	−11.32	[−15.51; −7.13]	< 0.001	−9.91	[−13.95; −5.89]	< 0.001

SF-12 12-Item Short-Form Survey, CI confidence interval

^aadjusted for sociodemographic (age, sex, education, employment, marital status) and health-related variables (diabetes duration ≥10 years, oral glucose-lowering drugs, insulin, number of comorbidities > 3)