Table 3.
Analysis of day 14 IgG levels (mg/dl) for the IVIG trial
| Birth weight stratum | Analysis | Estimated correlation | Estimated treatment difference | Standard error | 95% Confidence interval |
|---|---|---|---|---|---|
| 501 to 1000 g | ANOVA | N/A | 194.05 | 10.47 | (173.50,214.61) |
| LMEM | 0.41 | 194.24 | 10.42 | (173.78,214.71) | |
| (n = 743 babies) | GEE | 0.44 | 194.34 | 10.37 | (174.02,214.65) |
| 1001 to 1500 g | ANOVA | N/A | 177.23 | 10.21 | (157.20,197.26) |
| LMEM | 0.54 | 179.79 | 10.03 | (160.11,199.47) | |
| (n = 1267 babies) | GEE | 0.36 | 178.74 | 10.06 | (159.03,198.46) |
Randomization was done independently for twins. The multiple gestation rates were 15% and 16% for the 501 to 1000 g babies and 1001 to 1500 g babies, respectively.