Trajectory group | Parameter | Maximum likelihood estimates | |||
---|---|---|---|---|---|
Est. | SE | z value | p value | ||
Class 1: persistently low cognitive function (n = 1550, 18.9%) | Intercept | − 5.04 | 1.21 | − 4.157 | < 0.001 |
Linear (age) | 1.38 | 0.38 | 3.592 | < 0.001 | |
Quadratic (age2) | − 0.13 | 0.03 | − 4.201 | < 0.001 | |
Class 2: persistently moderate cognitive function (n = 3194, 38.9%) | Intercept | − 6.02 | 0.98 | − 6.153 | < 0.001 |
Linear (age) | 2.05 | 0.31 | 6.615 | < 0.001 | |
Quadratic (age2) | − 0.18 | 0.03 | − 7.308 | < 0.001 | |
Class 3: persistently high cognitive function (n = 3460, 42.2%) | Intercept | 11.35 | 6.13 | 1.853 | 0.064 |
Linear (age) | − 5.26 | 2.93 | − 1.795 | 0.073 | |
Quadratic (age2) | 0.89 | 0.46 | 1.928 | 0.054 | |
Cubic (age3) | − 0.05 | 0.02 | − 2.109 | 0.035 |