Results of Principal Components Analysis
| Grouping | Coefficient for component 1 | Coefficient for component 2 |
|---|---|---|
| Note: Consultant O&G per 1000 deliveries was the only ‘staffing’ variable to be included and so was not included in the Principal Components Analysis. | ||
| NICU, Neonatal intensive care unit; SCBU, special care baby unit; O&G, obstetric and gynaecology. | ||
| Interventional: 78% total variation explained | ||
| Caesarean sections per 100 deliveries | 0.30084 | −0.64642 |
| Epidurals per 100 deliveries | 0.45175 | 0.06840 |
| Epidurals in labour per 100 deliveries | 0.42888 | 0.12588 |
| Forceps deliveries per 100 births | 0.25542 | 0.54584 |
| General anaesthetics per 100 caesareans | −0.38094 | 0.03448 |
| Spontaneous vaginal deliveries per 100 births | −0.39276 | 0.38424 |
| Instrumental vaginal deliveries per 100 births | 0.39606 | 0.33888 |
| Variability explained by component | 64% | 14% |
| Facilities: 90% total variation explained | ||
| NICU cots per 1000 deliveries | 0.70711 | NA |
| SCBU cots per 1000 deliveries | 0.70711 | |
| Variability explained by component | 90% | |
| Parental: 88% total variation explained | ||
| Percentage births to teenage mothers | 0.56459 | 0.22933 |
| Percentage births with fathers of manual social class | 0.59464 | 0.16133 |
| Percentage of babies from multiple births | −0.20234 | 0.95808 |
| Percentage of births to nulliparous women | −0.53544 | 0.05892 |
| Variability explained by component | 64% | 24% |