| | HTLV1 antibody | Negative | Positive | Total | P value | | No (%) | No (%) | No (%) |
| | Neonatal weight | | | | | | Lower than normal | 16 (4.0%) |
0 (0%) | 16 (3.9%) | | | Normal (2700–4000 gr) | 370 (92.3%) | 6 (100.0%) | 376 (92.4%) | 0.972 | | More than normal | 15 (3.7%) | 0 (.0%) | 15 (3.7%) | |
| | Total | 401 (100.0%) | 6 (100.0%) | 407 (100.0%) | |
| | Neonatal sex | | | | | | Male | 202 (50.4%) | 4 (66.7%) | 206 (50.6%) | 0.685 | | Female | 199 (49.6%) | 2 (33.3%) | 201 (49.4%) |
| | Total | 401 (100.0%) | 6 (100.0%) | 407 (100.0%) | |
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