Table 3. Overall mortality and by birth weight range on the 28th day of life.
| Secondary variables | Control group n (%) | Butantan group n (%) | p value |
|---|---|---|---|
| Overall mortality | 55 (33.33) | 57 (39.86) | 0.24 |
| BW <750g (n=53) | 21 (67.74) | 15 (68.18) | 0.97 |
| BW ≥750g and <1,000g (n=109) | 23 (39.66) | 26 (50.98) | 0.24 |
| BW ≥1,000g and <1,500g (n=146) | 11 (14.47) | 16 (22.86) | 0.19 |
Continuous variables were analyzed using the Student’s t or Mann-Whitney test, as appropriate. Qualitative variables were analyzed using the χ2 or Fischer’s exact test, as appropriate. BW: birth weight.