Association between Ambient Illumination and Cognitive Impairment: A Population-Based Study of Older

Table 3

Estimation of change-points in the association between AI and cognitive impairment.

Outcome	OR (95% CI), -value
Model 1 fitting model by standard linear regression	0.872 (0.699, 1.088), 0.211
Model 2 fitting model by two-piecewise linear regression
Infection point	1.22
≤1.22	0.35 (0.18, 0.70), 0.005
>1.22	1.05 (0.71, 1.53), 0.81

Age, gender, race, the education level, and diagnosis of CKD, MetS, and hypertension were adjusted.