| Variables | Descriptions | |
| Dependent variable |
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| Depression | Assignment 10 - 40, the greater the value, the more depressed |
| Independent Variable |
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| Arrangement | Co-residence (Set as Baseline) |
| Near-residence | ||
| Neighborhood-residence | ||
| In-city-residence | ||
| Out-city-residence | ||
| Control Variables |
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| Age | Age(60 to 80) |
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| Gender | 1 = Male, 0 = Female |
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| Married | 1 = Yes, 0 = No |
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| HuKou | 1 = Urban, 0 = Rural |
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| Education | From 1 to 11 mean Illiterate to Ph.D. |
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| A-Children | Num of Alive Children |
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| D-Children | Num of Died Children |
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| Income | Wage and Pension |
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| House | Household Own the House :1 = Yes, 0 = No |
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| Assets | Cash and Deposits in financial institutions |
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| ADL | The Greater the Poor Self-care Ability |
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| Health | 3 = good, 2 = fair, 1 = poor |
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| Insurance | 1 = Health Insurance, 0 = No |