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| Level of SDF (%) | Men with ≥4% morphologically normal sperm cells, N (%) | Men with <4% morphologically normal sperm cells, N (%) |
|---|---|---|
| 0–18 | 166 (73.12) | 110 (37.16)** |
| >18 | 61 (26.88) | 186 (62.84)** |
**, highly significant difference between compared groups at P<0.0001. Chi2 test. N, number of subjects; SDF, sperm DNA fragmentation.
