Table 2 Fit statistics for global cognitive function group trajectories in middle-aged and older adults from CHARLS

BIC*

− 35,903.71

− 32,658.89

− 32,120.03

− 32,098.63

− 32,099.94

− 32,116.00

AIC*

− 35,886.18

− 32,623.83

− 32,074.44

− 32,039.02

− 32,029.82

− 32,031.85

Class proportion^¶

Class 1, 100%

Class 1, 38.29%

Class 1, 18.89%

Class 1, 12.49%

Class 1, 13.36%

Class 1, 13.24%

Class 2, 61.71%

Class 2, 38.93%

Class 2, 21.54%

Class 2, 18.36%

Class 2, 17.61%

Class 3, 42.17%

Class 3, 31.55%

Class 3, 20.40%

Class 3, 19.34%

Class 4, 34.42%

Class 4, 36.26%

Class 4, 0.40%

Class 5, 11.62%

Class 5, 36.18%

Class 6, 13.23%

APP^‡

Class 1, 0.92

Class 1, 0.87

Class 1, 0.80

Class 1, 0.79

Class 1, 0.79

Class 2, 0.94

Class 2, 0.80

Class 2, 0.67

Class 2, 0.56

Class 2, 0.56

Class 3, 0.89

Class 3, 0.67

Class 3, 0.50

Class 3, 0.48

Class 4, 0.84

Class 4, 0.79

Class 4, 0.58

Class 5, 0.48

Class 5, 0.67

Class 6, 0.47