Table 5.
Standardized coefficients for measurement and structural models
| Models | Parameters | Coefficients | Z value | Goodness-of-fit indices |
|---|---|---|---|---|
| Measurement models | χ2(1) = 35.1, P < 0.001, CFI = 0.99, TLI = 0.98, SRMR = 0.01; RMSEA = 0.06 (0.04–0.08) | |||
| Trajectory of PP | Intercept | 55.13a | 357.75 | |
| Slope | − 0.07 | − 0.91 | ||
| Trajectory of cognitive score | Intercept | 10.48a | 241.29 | χ2(1) = 91.6, P < 0.001, CFI = 0.99, TLI = 0.97, SRMR = 0.02; RMSEA = 0.09 (0.08–0.10) |
| Slope | − 0.28a | − 13.91 | ||
| Structural models | ||||
| Unconditional model | PP intercept → cog intercept | − 0.25a | 17.28 | χ2(8) = 125.8, P < 0.001, CFI = 0.99, TLI = 0.99, SRMR = 0.02; RMSEA = 0.04 (0.03–0.05) |
| PP intercept → cog slope | − 0.16a | − 3.53 | ||
| PP slope → cog slope | − 0.06 | − 0.66 | ||
| Conditional modelb | PP intercept → cog intercept | − 0.04a | − 2.56 | χ2(68) = 285.5, P < 0.001, CFI = 0.99, TLI = 0.98, SRMR = 0.01; RMSEA = 0.02 (0.02–0.02) |
| PP intercept → cog slope | − 0.10 | − 1.34 | ||
| PP slope → cog slope | − 0.07 | − 0.63 |
Abbreviations: CFI Comparative fit index, Cog Cognition, PP Pulse pressure, RMSEA Root mean square error of approximation, SRMR Standardized root mean square residual, TLI Tucker-Lewis index
aStatistical significance
bAdjusted for age, sex, body mass index, education level, marital status, smoking, alcohol use, hukou status, living status and health status before age 16, hypertension, diabetes or high blood sugar, psychiatric problems, memory-related disease, stroke, glucose, glycosylated hemoglobin, total cholesterol, activities of daily living, and depression symptoms