Prospective associations between pulse pressure and cognitive performance in Chinese middle-aged and older population across a 5-year study period

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	55.13^a	357.75
Trajectory of PP	Slope	− 0.07	− 0.91
Trajectory of cognitive score	Intercept	10.48^a	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)
Trajectory of cognitive score	Slope	− 0.28^a	− 13.91
Structural models
Unconditional model	PP intercept → cog intercept	− 0.25^a	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	− 0.16^a	− 3.53
	PP slope → cog slope	− 0.06	− 0.66
Conditional model^b	PP intercept → cog intercept	− 0.04^a	− 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

ISSN: 1758-9193