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Regression analysis.
| Variable | (1) | (2) |
|---|---|---|
| U | 0.187*** | 0.286*** |
| (3.393) | (4.431) | |
| Population | 0.229*** | 0.334*** |
| (3.395) | (4.086) | |
| Urbanization | −0.207*** | −0.217*** |
| (−2.694) | (−2.831) | |
| Hospital | 0.195*** | 0.188*** |
| (2.803) | (2.71) | |
| Child | 0.040 | 0.028 |
| (0.547) | (0.379) | |
| U*SO2 | −0.174** | |
| (−2.252) |
: Significant at the 5 and 1% levels, respectively.
