Table 2.
Demographics of children and mothers and incidence of RSVH
| Demographic factors | RSVH children | Non-RSVH children | Incidence of RSVH (95% CI) | |
| Number of children | 13,362 | 610,408 | 2.1% (2.1–2.2%) | |
| Mothers | ||||
| Age at giving birth (years) | Mean (SD) | 28.1 (6.1) | 28.9 (6.1)* | – |
| Median [IQR] | 28 [23–33] | 29 [24–33] | – | |
| SIMD Quintile, n (%) | 1—most deprived | 4090 (30.7) | 154,969 (25.5)* | 2.6% (2.5–2.7%) |
| 2 | 2898 (21.7) | 125,557 (20.6) | 2.3% (2.2–2.3%) | |
| 3 | 2319 (17.4) | 112,694 (18.5) | 2.0% (1.9–2.1%) | |
| 4 | 2073 (15.6) | 110,366 (18.1) | 1.8% (1.8–1.9%) | |
| 5—least deprived | 1947 (14.6) | 105,278 (17.3) | 1.8% (1.7–1.9%) | |
| Smoking history at pre-delivery assessment, n (%) | Current | 4095 (34.0) | 131,157 (23.8)* | 3.0% (2.9–3.1%) |
| Former | 1141 (9.5) | 58,859 (10.7) | 1.9% (1.8–2.0%) | |
| Never | 6805 (56.5) | 360,410 (65.5) | 1.9% (1.8–1.9%) | |
| Previous pregnancies, n (%) | 0 | 3336 (25.0) | 223,800 (36.7) | 1.5% (1.4–1.5%) |
| 1 | 4346 (32.5) | 188,201 (30.8)† | 2.3% (2.2–2.3%) | |
| 2+ | 5680 (42.5) | 198,404 (32.5)† | 2.8% (2.7–2.9%) | |
| Children and births | ||||
| Gender, n (%) | Male | 7554 (56.5) | 311,535 (51.0)* | 2.4% (2.3–2.4%) |
| Multiple births, n (%) | Singleton | 12,616 (94.4) | 592,912 (97.1) | 2.1% (2.0–2.1%) |
| Multiple | 744 (5.6) | 17,469 (2.9)* | 4.1% (3.8–4.4%) | |
| Emergency caesarean, n (%) | Percentage requiring | 2224 (16.6) | 92,738 (15.2)* | 2.3% (2.2–2.4%) |
| Apgar score, n (%) | < 7 | 347 (2.6) | 8022 (1.3)* | 4.1% (3.7–4.6%) |
| ≥ 7 | 12,795 (97.4) | 593,129 (98.7) | 2.1% (2.1–2.1%) | |
| Gestational age at birth (weeks) | Mean (SD) | 38.2 (2.9) | 39.3 (2.1)* | – |
| Median [IQR] | 39 [38–40] | 40 [39–41] | – | |
| Birthweight (g) | Mean (SD) | 3177 (761) | 3395 (586)* | – |
| Median [IQR] |
3280 [2810-3680] |
3420 [3070–3770] |
– | |
CI confidence interval, IQR: interquartile range, RSVH respiratory syncytial virus hospitalisation, SD standard deviation, SIMD Scottish Index of Multiple Deprivation
*p < 0.0001 vs. RSVH group; †p < 0.0001 for combined ≥ 1 pregnancies vs. RSVH group