Table 4.
Decomposition of socioeconomic-related inequalities in DMFT by age group
| 55–64 years old | 65–74 years old | Total sample (35–74 years old) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Variables | Elasticity | CIs | Contribution | % | Elasticity | CIs | Contribution | % | Elasticity | CIs | Contribution | % |
| Location (Urban area ref ) | -25.69 | 1.93 | -7.07 | |||||||||
| Rural | -0.1141 | -0.0879 | 0.0100 | -25.69 | 0.0082 | -0.0932 | -0.0008 | 1.93 | -0.0488 | -0.0867 | 0.0042 | -7.07 |
| Gender (Male ref ) | 4.06 | 1.76 | 3.82 | |||||||||
| Female | 0.1523 | -0.0104 | -0.0016 | 4.06 | 0.1171 | -0.0059 | -0.0007 | 1.76 | 0.2049 | -0.0112 | -0.0023 | 3.82 |
| Nationality (Han ref ) | 2.05 | 0.78 | 1.70 | |||||||||
| Minority | 0.0065 | -0.1242 | -0.0008 | 2.05 | 0.0085 | -0.0359 | -0.0003 | 0.78 | 0.0107 | -0.0957 | -0.0010 | 1.70 |
| Chronic disease (NO ref ) | -0.16 | -1.03 | 1.57 | |||||||||
| Yes | 0.0327 | 0.0020 | 0.0001 | -0.16 | 0.0152 | 0.0266 | 0.0004 | -1.03 | 0.0174 | -0.0538 | -0.0009 | 1.57 |
| Basic medical insurance (No insurance ref ) | 38.61 | 24.48 | 15.34 | |||||||||
| UEBMI | -0.0702 | 0.4712 | -0.0331 | 84.80 | 0.0108 | 0.5295 | 0.0057 | -14.50 | -0.0152 | 0.4174 | -0.0064 | 10.64 |
| URBMI | -0.0237 | 0.2038 | -0.0048 | 12.38 | 0.0032 | 0.2294 | 0.0007 | -1.89 | -0.0078 | 0.1566 | -0.0012 | 2.03 |
| NRCMI | -0.0838 | -0.2727 | 0.0228 | -58.56 | 0.0530 | -0.3027 | -0.0161 | 40.87 | 0.0057 | -0.2794 | -0.0016 | 2.67 |
| Smoking (No ref ) | 0.34 | 2.95 | 0.42 | |||||||||
| Yes | 0.0301 | -0.0044 | -0.0001 | 0.34 | 0.0130 | -0.0895 | -0.0012 | 2.95 | 0.0149 | -0.0168 | -0.0003 | 0.42 |
| Sweet consumption (Rarely ref ) | -18.14 | -11.34 | -13.79 | |||||||||
| 1 to 3 times a month | 0.0098 | -0.0164 | -0.0002 | 0.41 | 0.0149 | 0.0024 | 0.0000 | -0.09 | 0.0202 | -0.0318 | -0.0006 | 1.08 |
| Once a week or more | 0.0308 | 0.2346 | 0.0072 | -18.55 | 0.0218 | 0.2023 | 0.0044 | -11.25 | 0.0459 | 0.1937 | 0.0089 | -14.87 |
| Toothbrushing (< 1/day ref ) | 40.06 | 39.21 | 24.54 | |||||||||
| Once a day | -0.1633 | -0.0367 | 0.0060 | -15.35 | -0.1315 | -0.0256 | 0.0034 | -8.58 | -0.1877 | -0.0816 | 0.0153 | -25.58 |
| Twice a day or more | -0.0847 | 0.2564 | -0.0217 | 55.63 | -0.0656 | 0.2861 | -0.0188 | 47.79 | -0.1404 | 0.2136 | -0.0300 | 50.13 |
| Education (low ref ) | 40.06 | 20.53 | 29.94 | |||||||||
| Moderate | -0.0336 | 0.0975 | -0.0033 | 8.39 | -0.0201 | 0.2127 | -0.0043 | 0.1086 | -0.0484 | 0.0120 | -0.0006 | 0.97 |
| High | -0.0402 | 0.3077 | -0.0124 | 31.67 | -0.0076 | 0.5028 | -0.0038 | 9.67 | -0.0500 | 0.3469 | -0.0173 | 28.97 |
| Incomea | -0.0986 | 0.0749 | -0.0074 | 18.93 | -0.0652 | 0.0903 | -0.0059 | 14.99 | -0.1620 | 0.0704 | -0.0114 | 19.05 |
| Region (East ref ) | -22.61 | -3.89 | -12.34 | |||||||||
| Middle | -0.0402 | -0.1429 | 0.0057 | -14.72 | -0.0073 | -0.1115 | 0.0008 | -2.08 | -0.0349 | -0.1067 | 0.0037 | -6.22 |
| West | -0.0263 | -0.1171 | 0.0031 | -7.90 | -0.0056 | -0.1277 | 0.0007 | -1.81 | -0.0241 | -0.1522 | 0.0037 | -6.12 |
| Occupation (Agriculture ref ) | 14.40 | 9.42 | 3.58 | |||||||||
| Nonagriculture | -0.0063 | 0.4008 | -0.0025 | 6.52 | -0.0033 | 0.4474 | -0.0015 | 3.72 | -0.0004 | 0.3325 | -0.0001 | 0.20 |
| Unemployment | -0.0102 | 0.0762 | -0.0008 | 1.99 | 0.0121 | 0.0047 | 0.0001 | -0.15 | 0.0035 | -0.0022 | 0.0000 | 0.01 |
| Retirement | -0.0058 | 0.3948 | -0.0023 | 5.89 | -0.0052 | 0.4407 | -0.0023 | 5.84 | -0.0060 | 0.3351 | -0.0020 | 3.37 |
| Age group (35–44 ref ) | 47.93 | |||||||||||
| 55–64 | 0.1572 | -0.0738 | -0.0116 | 19.38 | ||||||||
| 65–74 | 0.1804 | -0.0947 | -0.0171 | 28.55 | ||||||||
| Sum | -0.0359 | 92.13 | -0.0402 | 99.79 | -0.0686 | 114.72 | ||||||
| Residual term | -0.0031 | 7.87 | 0.0009 | 0.21 | 0.0086 | -14.72 | ||||||
| Total | -0.0380 | 100.00 | -0.0393 | 100.00 | -0.0600 | 100.00 | ||||||
Aggregated contributions are in bold
Abbreviations: NRCMI, New Rural Cooperative Medical Scheme; UEBMI, Urban Employee Basic Medical Insurance; URBMI, Urban Resident Basic Medical Insurance
Ref, reference group
a Natural log of annual household income per capita was calculated in the regression