Figure 1.

Adjusted HRs for cognitive impairment risk: dietary substitution of calcium intake from dinner to breakfast. Adjustments included age, gender, smoking status, drinking, urban index, physical activity, total energy, carbohydrate, protein, fat, dietary fiber, hypertension status, T2DM status, and BMI. Model 1, replacing 5% dietary calcium intake at dinner with dietary calcium intake at breakfast; Model 2, replacing 5% dietary calcium intake at dinner with dietary calcium intake at breakfast, when breakfast and a morning snack were considered as breakfast; Model 3, replacing 5% dietary calcium intake at dinner with dietary calcium intake at breakfast, when dinner and an evening snack were considered as dinner; Model 4, replacing 5% dietary calcium intake at dinner with dietary calcium intake at breakfast, when breakfast and a morning snack were considered as breakfast, and dinner and an evening snack were considered as dinner