Table 3.

Stepwise multivariable (both directions selection) linear regression analysis exploring factors correlated with Aβ1–42.

	Overall			Group1 (<35)			Group2 (35–65)			Group3 (>65)
Predictors	β-Estimate	96% CI	p-value	β-Estimate	96% CI	p-value	β-Estimate	96% CI	p-value	β-Estimate	96% CI	p-value
(Intercept)	8.50	4.15–12.84	<0.001	25.35	17.56–33.15	<0.001	9.37	1.43–17.30	0.021	35.40	16.03–54.76	<0.001
Age	0.08	0.04–0.11	<0.001	−0.24	−0.42 to −0.05	0.011	0.14	0.01–0.28	0.038
Total Cholesterol	0.03	0.01–0.05	0.009							0.04	0.00–0.07	0.042
Creatinine				2.75	−0.43–5.93	0.089
Glucose				−0.07	−0.15–0.00	0.055
TSH							2.30	0.43–4.17	0.016
Total Proteins										−3.40	−6.03 to −0.76	0.012
Observations	274			93			89			92
R2 / R2 adjusted	0.096/0.089			0.123/0.093			0.095/0.074			0.111/0.091

Bold values denote statistical significance at the p ≤ 0.05 level.