Table 2. Multiple linear regression analysis of Ruff Figural Fluency Test score on type 2 diabetes and age.

	Model 1a			Model 2a			Model 3a
	B	95% CI	p	B	95% CI	p	B	95% CI	p
Age (years)	–0.90	–0.96 to –0.84	<0.001	–0.92	–0.98 to –0.86	<0.001	–0.92	–0.99 to –0.85	<0.001
Gender (women vs. men)	0.09	–1.18 to 1.36	0.89	0.01	–1.25 to 1.28	0.98	–0.78	–2.23 to 0.66	0.29
Educational level (vs. primary school)
Lower secondary education	5.88	3.55 to 8.22	<0.001	6.01	3.68 to 8.34	<0.001	5.37	3.00 to 7.74	<0.001
Higher secondary education	13.68	11.25 to 16.11	<0.001	13.67	11.25 to 16.10	<0.001	12.80	10.32 to 15.27	<0.001
University	24.19	21.80 to 26.58	<0.001	24.16	21.77 to 26.54	<0.001	22.55	20.07 to 25.02	<0.001
Type 2 diabetes (yes vs. no)	–6.27	–8.90 to –3.63	<0.001	–40.27	–57.20 to –23.35	<0.001	–35.91	–53.01 to –18.80	<0.001
Type 2 diabetes x age	-	-	-	0.54	0.27 to 0.80	<0.001	0.48	0.22 to 0.75	<0.001
BMI (kg/m2)	-	-	-	-	-	-	–0.15	–0.31 to 0.01	0.07
Smoker (yes vs. no)	-	-	-	-	-	-	–2.88	–4.42 to –1.34	<0.001
Systolic BP (mmHg)	-	-	-	-	-	-	–0.01	–0.06 to 0.03	0.52
HDL cholesterol (mmol/L)	-	-	-	-	-	-	2.31	0.40 to 4.22	0.02
Non-HDL cholesterol (mmol/L)	-	-	-	-	-	-	0.11	–0.53 to 0.74	0.74
Microalbuminuria (yes vs. no)	-	-	-	-	-	-	–1.39	–3.32 to 0.53	0.16

Abbreviations: B, unstandardized B-coefficient; CI, confidence interval; Systolic BP, Systolic Blood Pressure.

^aFor all models: adjusted R², 0.37; residual standard deviation, 21.