Table 4 Unconditional quantile regression for sociodemographic determinants of CHAI score among older adults aged 60+, CHARLS 2011 and 2015
Variables | 25th Coefficients (95% CIs) | 50th Coefficients (95% CIs) | 75th Coefficients (95% CIs) |
|---|---|---|---|
CHAI score | 4.34 | 5.78 | 7.34 |
Age groups | |||
 60–64 (ref.) | |||
 65–69 | 0.49*** (0.22, 0.75) | 0.49*** (0.29, 0.68) | 0.40*** (0.23, 0.57) |
 70–74 | 0.96*** (0.72, 1.20) | 1.09*** (0.90, 1.28) | 1.10*** (0.85, 1.35) |
 75–79 | 1.21*** (1.01, 1.41) | 1.50*** (1.31, 1.68) | 2.11*** (1.81, 2.42) |
 ≥ 80 | 1.41*** (1.20, 1.62) | 1.86*** (1.67, 2.06) | 2.92*** (2.49, 3.34) |
Sex | |||
 Female (ref.) | |||
 Male | 0.55*** (0.35, 0.76) | 0.53*** (0.37, 0.69) | 0.38*** (0.17, 0.58) |
Marital status | |||
 Others (ref.) | |||
 Married | −0.30*** (− 0.46, − 0.14) | − 0.40*** (− 0.55, − 0.25) | − 0.32*** (− 0.52, − 0.11) |
Education | |||
 Illiterate (ref.) | |||
 Primary school | − 0.42*** (− 0.57, − 0.27) | − 0.39*** (− 0.53, − 0.25) | − 0.42*** (− 0.62, − 0.22) |
 Middle school | −1.08*** (−1.50, − 0.67) | − 1.17*** (− 1.45, − 0.88) | − 0.85*** (− 1.09, − 0.60) |
 High school or higher | −1.08*** (− 1.46, − 0.71) | −1.04*** (− 1.33, − 0.75) | − 0.97*** (− 1.30, − 0.64) |
Region | |||
 North (ref.) | |||
 East | − 0.18 (− 0.54, 0.19) | − 0.06 (− 0.37, 0.25) | −0.01 (− 0.39, 0.36) |
 Central | 0.10 (− 0.14, 0.34) | 0.12 (− 0.09, 0.34) | 0.19 (− 0.08, 0.45) |
 Southwest | 0.22* (− 0.03, 0.48) | 0.24** (0.01, 0.47) | 0.47*** (0.19, 0.76) |
 Northeast | 0.26 (−0.06, 0.59) | 0.21 (−0.08, 0.50) | 0.25 (− 0.10, 0.61) |
 Northwest | 0.29** (0.01, 0.57) | 0.32** (0.06, 0.58) | 0.59*** (0.22, 0.95) |
 South central | 0.24* (−0.02, 0.50) | 0.29** (0.05, 0.52) | 0.51*** (0.21, 0.80) |
 South east | −0.16 (− 0.48, 0.16) | −0.17 (− 0.46, 0.12) | 0.35* (− 0.03, 0.73) |
 South | −0.23 (− 0.87, 0.41) | 0.01 (− 0.41, 0.44) | 0.19 (− 0.27, 0.65) |
Current residence | |||
 Urban (ref.) | |||
 Rural | 0.06 (− 0.07, 0.19) | −0.02 (− 0.14, 0.10) | 0.01 (− 0.17, 0.18) |
Smoking | |||
 No (ref.) | |||
 Yes | 0.08 (−0.09, 0.25) | 0.10 (−0.05, 0.25) | 0.25** (0.05, 0.46) |
Weight status | |||
 BMI < 24 (ref.) | |||
 BMI ≥ 24 (overweight) | 0.56*** (0.39, 0.73) | 0.58*** (0.45, 0.72) | 0.65*** (0.47, 0.83) |
Chronic disease | |||
 No (ref.) | |||
 Yes | 0.24*** (0.07, 0.42) | 0.29*** (0.15, 0.43) | 0.25*** (0.09, 0.41) |
Social activity | |||
 No (ref.) | |||
 Yes | −0.19*** (−0.33, −0.05) | −0.22*** (− 0.34, − 0.10) | −0.26*** (− 0.42, − 0.09) |
Survey year | |||
 2011 (ref.) | |||
 2015 | −0.36*** (− 0.53, − 0.18) | −0.38*** (− 0.51, − 0.24) | −0.36*** (− 0.52, − 0.20) |
N | 8182 | 8182 | 8182 |
Adj.R2 | 0.12 | 0.17 | 0.16 |