Characteristics of children recruited for the communication study at each site and for non-respondents
| Characteristic | Site A | Site B | Site C | Site D | Overall | All non-respondents |
| Total responses | 115 | 92 | 96 | 82 | 385 | 200 |
| Black or minority ethnic (%) | 23 | 35 | 23 | 7 | 22 | 24 |
| Complication (%) | 50 | 61 | 46 | 49 | 51 | 52 |
| Neonate (<30 days) | 51% | 42% | 27% | 34% | 39% | 37% |
| Infant | 32% | 43% | 36% | 33% | 36% | 39% |
| Child (>1 year) | 17% | 15% | 37% | 33% | 25% | 24% |
| Length of stay a week or less | 20% | 13% | 10% | 7% | 13% | 17% |
| Length of stay 1–3 weeks | 46% | 54% | 58% | 63% | 55% | 45% |
| Length of stay over 3 weeks | 34% | 33% | 32% | 29% | 32% | 38% |
| Child over 7 (excluded from Q1 and Q3 analysis) | 5% | 3% | 5% | 9% | 5% | 6% |