Table 4 The impact of the NRCMS on the rural elderly’s nutrition intake based on the PSM-DID model
From: Medical system and nutrition improvement for the rural elderly
| Dependent variables | Outcome variables | Coef | SE | P value |
|---|---|---|---|---|
| Energy | Before: differ (treated-control) | 21.562 | 66.141 | 0.744 |
| After: differ (treated-control) | 186.918 | 71.438 | 0.009 | |
| Diff-in-diff | 165.356 | 97.355 | 0.090 | |
| Carbohydrates | Before: differ (treated-control) | − 1.030 | 11.245 | 0.927 |
| After: differ (treated-control) | 28.742 | 13.599 | 0.035 | |
| Diff-in-diff | 29.772 | 17.646 | 0.092 | |
| Fat | Before: differ (treated-control) | 2.259 | 2.974 | 0.448 |
| After: differ (treated-control) | 5.796 | 3.689 | 0.116 | |
| Diff-in-diff | 3.537 | 4.738 | 0..455 | |
| Protein | Before: differ (treated-control) | − 1.684 | 2.607 | 0.518 |
| After: differ (treated-control) | 4.468 | 2.476 | 0.071 | |
| Diff-in-diff | 6.151 | 3.595 | 0.087 |