Table 3 Quality checks for subsequent requests for data on births during the pre-randomisation phase
Request period | Maternal weight | Maternal height | Maternal ethnicity | Maternal parity | Neonatal sex | Gestational age at birth | Neonatal birthweight | |
|---|---|---|---|---|---|---|---|---|
Number sites where variable was missing completely | First request for pre-randomisation data | 4 | 4 | 3 | 2 | 4 | 1 | 3 |
Second request for pre-randomisation | 1 | 1 | 0 | 1 | 0 | 0 | 0 | |
% complete at sites where variable provided (median; range) | First request for pre-randomisation data | 98.6% (85.6–100.0%) | 98.6% (86.2–100.0%) | 100.0% (67.2–100.0%) | 99.2% (1.0–100.0%) | 100.0% (99.2–100.0%) | 100.0% (80.4–100.0%) | 100.0% (99.0–100.0%) |
Second request for pre-randomisation | 96.5% (0.6–99.8%) | 96.5% (0.6–99.8%) | 98.9% (23.9–100.0%) | 98.1% (20.3–100.0%) | 100.0% (99.1–100.0%) | 99.9% (89.0–100.0%) | 99.9% (99.1–100.0%) |