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| Level of SDF (%) | Men with ≥4% morphologically normal sperm cells, N (%) | Men with <4% morphologically normal sperm cells, N (%) |
|---|---|---|
| 0–15 | 133 (58.60) | 68 (22.97)** |
| 16–30 | 83 (36.56) | 131 (44.26) |
| >30 | 11 (4.84) | 97 (32.77)** |
**, highly significant difference between compared groups at P<0.0001. Chi2 test. N, number of subjects; SDF, sperm DNA fragmentation.
