Table 1.
Variable definition.
| Variables | Definitions |
|---|---|
| Health variables | |
| ADL | Number of activities of daily living for which assistance is not needed |
| IADL | Number of instrumental activities of daily living for which assistance is not needed |
| Cooking fuel choice | |
| NON-SOLID FUEL | 1 = non-solid fuel for cooking; 0 = solid fuel for cooking |
| Control variables | |
| AGE | Age (years) |
| MALE | 1 = male; 0 = female |
| EDUPRIMARY | 1 = if highest education is primary school and below; 0 = otherwise |
| EDUJUNIOR | 1 = if highest education is junior high school; 0 = otherwise |
| EDUSENIOR | 1 = if highest education is senior high school and above; 0 = otherwise |
| MARRIED | 1 = married; 0 = not married |
| FARM | 1 = had farm work last week; 0 = otherwise |
| OFFFARM | 1 = had off-farm work last week; 0 = otherwise |
| SMOKING | 1 = has ever smoked before; 0 = otherwise |
| DRINKING | 1 = drank an alcoholic beverage last year; 0 = otherwise |
| HHSIZE | Number of family members living together |
| FRATIO | The proportion of female members in the family |
| CHILDNUM | Number of living sons and daughters |
| ASSETS | The total value of main durable assets (10 thousand RMB) |
| STRUCTURE | House structure: 1 = concrete and steel/bricks and wood; 0 = adobe/thatched/cave dwelling/tent/stone |
| FUEL_OTHER | The fraction of other surveyed individuals in the village who use non-solid fuels for cooking |
Notes: Authors' definitions.