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Distribution of PHQ-9 score ranges by population
| Group | 0 | 1–4 | 5–9 | >10 |
|---|---|---|---|---|
| Iowa IVF (%)(n=321) | 45.2** | 44.9 | 8.1 | 1.9 |
| NHANES (%)(n=4836) | 34 | 44.5 | 14.7 | 6.8 |
| Postpartum women (%)(n=7860) | 19.9 | 50.7 | 19.6 | 9.9 |
The overall distributions of scores were significantly different from one another at a level of P< .0001
