| | Variable | Total of patients or mean value |
| | Gender | | | Female | 22/624 (3,5%) | | Male | 39/868 (4,5%) | | Gestational age (weeks) | 33,7 (range 26–40) | | <28 | 5/18 (27,8%) | | [28–32[ | 14/85 (16,5%) | | [32–34[ | 8/93 (8,6%) | | [34–37[ | 19/364 (5,2%) | | ≥37 | 15/932 (1,6%) | | Birth weight (g) | 2030 (range 795–4780) | | <750 | — | | [750–1000[ | 5/14 (35,7%) | | [1000–1500[ | 15/72 (20,8%) | | [1500–2500[ | 26/464 (5,6%) | | [2500–4000[ | 14/881 (1,6%) | | ≥4000 | 1/49 (2,0%) | | Mode of delivery | | | Cesarean section | 30/721 (4,2%) | | Vaginal delivery | 31/771 (4,0%) | | Mechanical ventilation | | | Invasive | 3/52 (5,8%) | | Noninvasive | 21/45 (46,7%) | | Both modalities | 7/151 (4,6%) | | Previous phototherapy | 46/675 (6,8%) | | Parenteral nutrition | 30/221 (13,6%) | | Time to conjunctivitis (days) | 8,5 (range 1–28) | | Length of stay (days) | 25,2 (range 3–88) |
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