Table 1 Baseline characteristics of the HPE, HPP, and HPN groups before and after PSM
| Â | HPE | HPP | HPN | p for ANOVA |
|---|---|---|---|---|
Before PSM | ||||
 n | 1363 | 2359 | 5295 |  |
 Age (yr) | 45.5 ± 12.1 | 44.8 ± 12.3 | 43.7 ± 12.7 | <  0.001 |
 Female percent (n) | 33.2% (452) | 34.1% (805) | 36.7% (1938) | 0.018 |
 BMI | 24.2 ± 3.4 | 24.2 ± 3.3 | 23.9 ± 3.3 | < 0.001 |
 Two-examination time gap (month) | 17.1 ± 8.4 | 19.6 ± 10.0 | 19.2 ± 10.3 | < 0.001 |
After PSM | ||||
 n | 1363 | 912 | 1137 |  |
 Age | 45.5 ± 12.1 | 45.3 ± 12.8 | 45.0 ± 12.6 | 0.530 |
 Female percent (n) | 33.2% (452) | 31.9% (306) | 33.5% (363) | 0.703 |
 BMI | 24.2 ± 3.4 | 24.1 ± 3.2 | 24.0 ± 3.2 | 0.472 |
 Two-examination time gap (month) | 17.1 ± 8.4 | 17.3 ± 9.1 | 17.5 ± 9.0 | 0.143 |