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Process analysis (restricted to the intervention arm)
| n | % (95%CI) | Total N | |
|---|---|---|---|
| Received card and instructions | 1953 | 96.6 (95.8–97.4) | 2022 |
| Used card to check baby’s foot-length | 1443 | 73.9 (71.9–75.8)) | 1953 |
| Judged baby’s foot smaller than the card | 24 | 1.7 (1.0–2.3) | 1443 |
| Called toll-free number & listened to messages | 62 | 3.2 (2.4–3.9) | 1953 |
| Called number & listened to messages, among < 2500 g | 22 | 4.6 (2.7–6.5) | 476 |
