Characteristics/Variables (Reference group) | Model 1a | Model 2b | Model 3c | Model 4d | ||||
---|---|---|---|---|---|---|---|---|
IQ Range | P-value | IQ Ratio | P-value | Gini | P-value | CV | P-value | |
Gender (Females) | -1.175** | ≤ 0.001 | -0.668** | ≤ 0.001 | -0.040** | ≤ 0.001 | -0.067** | ≤ 0.001 |
Age | 0.066** | 0.008 | 0.052** | ≤ 0.001 | 0.003** | ≤ 0.001 | 0.006** | ≤ 0.001 |
BMI (Normal: 18.5 ≤ BMI < 24) | ||||||||
 Light (12 ≤ BMI < 18.5) | 0.140 | 0.805 | 0.172 | 0.509 | 0.011 | 0.333 | 0.017 | 0.406 |
 Heavy (24 ≤ BMI < 28) | -0.354 | 0.259 | -0.141 | 0.262 | -0.006 | 0.251 | -0.010 | 0.275 |
 Obese (28 ≤ BMI ≤ 60) | -0.009 | 0.987 | -0.052 | 0.817 | -0.001 | 0.956 | 0.003 | 0.865 |
Waist | -0.001 | 0.955 | -0.007 | 0.389 | 0.000 | 0.382 | -0.001 | 0.306 |
Subjective health (Poor) | ||||||||
 Moderate | 0.359 | 0.211 | 0.045 | 0.730 | 0.002 | 0.768 | 0.004 | 0.686 |
 Excellent | 0.756* | 0.034 | 0.140 | 0.347 | 0.008 | 0.250 | 0.015 | 0.220 |
Marital status (Not in marriage) | -0.267 | 0.436 | -0.093 | 0.534 | -0.013 | 0.060 | -0.018 | 0.110 |
Smoking (Never) | ||||||||
 Former | 0.683 | 0.097 | 0.390* | 0.017 | 0.019* | 0.014 | 0.032* | 0.014 |
 Long-term/Current | 0.379 | 0.270 | 0.262 | 0.067 | 0.023** | ≤ 0.001 | 0.040** | ≤ 0.001 |
Drinking (Never) | ||||||||
 Less than once a month | -0.611 | 0.135 | -0.178 | 0.280 | -0.015* | 0.045 | -0.024 | 0.055 |
 More than once a month | -0.017 | 0.954 | 0.012 | 0.917 | -0.004 | 0.497 | -0.006 | 0.543 |
Education (No formal education) | ||||||||
 Elementary school or below | -3.761** | ≤ 0.001 | -2.047** | ≤ 0.001 | -0.132** | ≤ 0.001 | -0.218** | ≤ 0.001 |
 Junior high school or above | -2.441** | ≤ 0.001 | -1.894** | ≤ 0.001 | -0.136** | ≤ 0.001 | -0.222** | ≤ 0.001 |
Social interaction (Inactive) | 0.001 | 0.997 | -0.121 | 0.254 | -0.019** | ≤ 0.001 | -0.033** | ≤ 0.001 |
Physical activity (Inactive) | ||||||||
 Low to moderately active | -0.371 | 0.365 | -0.335 | 0.071 | -0.029** | ≤ 0.001 | -0.046** | 0.002 |
 Highly active | 0.062 | 0.894 | -0.145 | 0.488 | -0.023* | 0.016 | -0.034* | 0.045 |
Family size (Small: 1 to 2) | ||||||||
 Medium (3 to 4) | -0.247 | 0.380 | -0.100 | 0.397 | -0.002 | 0.685 | -0.004 | 0.633 |
 Large (5 or more) | -0.361 | 0.296 | -0.115 | 0.411 | -0.003 | 0.602 | -0.007 | 0.535 |
Family socioeconomic status (Low) | ||||||||
 Relatively low | -0.400 | 0.284 | -0.104 | 0.518 | -0.008 | 0.283 | -0.012 | 0.348 |
 Relatively high | -0.198 | 0.615 | 0.033 | 0.843 | 0.005 | 0.479 | 0.009 | 0.471 |
 High | -0.012 | 0.973 | 0.086 | 0.572 | 0.007 | 0.324 | 0.013 | 0.272 |
Hukou (Agricultural hukou) | 0.829* | 0.033 | 0.112 | 0.450 | 0.005 | 0.541 | 0.007 | 0.601 |
Constants | 7.973** | ≤ 0.001 | 1.841 | 0.092 | 0.141** | 0.002 | 0.241** | 0.003 |
Work status FE | Yes | Yes | Yes | Yes | ||||
Community FE | Yes | Yes | Yes | Yes | ||||
Interviewed FE | Yes | Yes | Yes | Yes | ||||
Adjusted R-squared | 0.075 | 0.120 | 0.227 | 0.212 | ||||
RMSE | 7.217 | 2.999 | 0.140 | 0.241 | ||||
Average RIF | 9.086 | 2.619 | 0.188 | 0.333 | ||||
Observations | 4821 | 4821 | 4821 | 4821 |