Table 1 Definition and summary statistics of variables used in the analysis
From: Medical system and nutrition improvement for the rural elderly
Variable | Definition | Mean | SD |
|---|---|---|---|
Energy | Average daily energy intake (kcal/day) | 2052.907 | 708.801 |
Carbohydrates | Average daily carbohydrate intake (g/day) | 306.261 | 118.706 |
Fat | Average daily fat intake (g/day) | 63.062 | 37.365 |
Protein | Average daily protein intake (g/day) | 58.775 | 23.954 |
dnrcms | The treatment dummy, dnrcms = 0 for the control group, and dnrcms = 1 for the treatment group | 0.309 | 0.462 |
dt | The year dummy, dt = 0 for 2000, and dt = 1 for 2006 | 0.500 | 0.500 |
dnrcms*dt | The interaction term between dnrcms and dt | 0.154 | 0.361 |
Age | In years | 67.749 | 7.829 |
Gender | Male = 0, female = 1 | 0.525 | 0.499 |
Education | years of formal education | 3.364 | 3.793 |
Health | Self-assessed health condition, a vector of dummy variable, poor = 1, base; fair = 2; good = 3; excellent = 4 | 2.286 | 0.754 |
lnIncome | Per capital annual household income, in logarithm | 8.084 | 1.052 |
Hhsize | Number of people in the household | 3.594 | 1.913 |
Smoke | Currently smoking, yes = 1, no = 0 | 0.290 | 0.454 |
Drink | Drinking alcohol over last year, yes = 1, no = 0 | 0.273 | 0.445 |
Activity | A vector of dummy variable, no working ability = 1, base; light level = 2; moderate to vigorous level = 3 | 2.439 | 0.556 |
Insurance | Own of other medical insurances, yes = 1, no = 0 | 0.102 | 0.303 |
Province dummies | A vector of dummy variable | / | / |