Data used for analysis for each hospital, Thames hospitals, 1994–1996
| Variable | Data source (numerator/denominator where different) | Mean | SD | Range | N |
|---|---|---|---|---|---|
| Summary statistics are displayed for predictor and outcome variables. | |||||
| *Birth weight of each birth obtained, 500 g band data used for standardisation. | |||||
| NICU, neonatal intensive care unit; SCBU, special care baby unit; ONS, Office for National Statistics; RCOG, Royal College of Obstetricians and Gynaecologists; DOH, Department of Health; O&G, obstetric and gynaecology. | |||||
| Mean number of births per year | ONS birth and death registrations | 2877 | 807.7 | 872–4214 | 64 |
| Mean birth weight* | ONS birth and death registrations | 3306 | 75.0 | 3011–3423 | 64 |
| Crude stillbirth rate | ONS birth and death registrations | 5.69 | 2.008 | 1.93–12.42 | 64 |
| Crude neonatal mortality | ONS birth and death registrations | 3.54 | 2.289 | 1.11–11.73 | 64 |
| Standardised stillbirth rate | ONS birth and death registrations | 5.84 | 1.253 | 3.40–8.53 | 64 |
| Standardised neonatal mortality | ONS birth and death registrations | 3.48 | 0.827 | 1.90–5.39 | 64 |
| Mean number of consultant O&G sessions on labour ward per week | RCOG hospital recognition returns | 2.5 | 2.45 | 0–10 | 40 |
| Mean number of consultant anaesthetic sessions on labour ward per week | RCOG hospital recognition returns | 4.1 | 1.78 | 1–10 | 60 |
| Delivery beds per 1000 deliveries | RCOG hospital recognition returns/ONS registrations | 3.6 | 0.80 | 2.4–6.6 | 60 |
| NICU cots per 1000 deliveries | RCOG hospital recognition returns/ONS registrations | 1.3 | 1.13 | 0–6.8 | 60 |
| SCBU and NICU cots per 1000 deliveries | RCOG hospital recognition returns/ONS registrations | 6.1 | 2.10 | 2.6–17.0 | 60 |
| Spontaneous vaginal deliveries per 100 births | RCOG hospital recognition returns | 71.0 | 5.35 | 53.0–81.5 | 60 |
| Vaginal breech births per 100 breeches | RCOG hospital recognition returns | 23.7 | 11.80 | 1.5–52.5 | 60 |
| Emergency caesareans per 100 breeches | RCOG hospital recognition returns | 27.7 | 11.63 | 0–51.5 | 45 |
| Elective caesareans per 100 breeches | RCOG hospital recognition returns | 48.4 | 12.36 | 18.3–73.9 | 45 |
| Number of caesarean sections per 100 deliveries | RCOG hospital recognition returns | 18.0 | 3.84 | 8.0–33.4 | 60 |
| Number of forceps per 100 births | RCOG hospital recognition returns | 5.0 | 1.88 | 2.3–10.1 | 60 |
| Number of vacuum deliveries per 100 births | RCOG hospital recognition returns | 6.0 | 2.31 | 1.8–12.3 | 60 |
| Total number of instrumental vaginal deliveries per 100 births | RCOG hospital recognition returns | 11.1 | 2.68 | 5.0–19.1 | 60 |
| Number of inductions per 100 deliveries | RCOG hospital recognition returns | 19.6 | 4.45 | 11.9–40.0 | 59 |
| Number of epidurals per 100 deliveries | RCOG hospital recognition returns | 31.8 | 13.66 | 9.7–74.7 | 59 |
| Number of epidurals for labour per 100 deliveries | RCOG hospital recognition returns | 20.3 | 10.53 | 2.6–55.5 | 59 |
| Number of general anaesthetics per 100 caesarean sections | RCOG hospital recognition returns | 30.8 | 11.80 | 1.5–52.5 | 60 |
| Number of consultant paediatricians per 1000 births | DOH staffing data/ONS registrations | 1.2 | 0.53 | 0.34–3.26 | 57 |
| Number of junior paediatricians per 1000 births | DOH staffing data/ONS registrations | 2.9 | 1.03 | 0.9–6.5 | 56 |
| Number of consultant O&Gs per 1000 deliveries | DOH staffing data/ONS registrations | 1.4 | 0.63 | 0.7–4.7 | 58 |
| Number of junior O&Gs per 1000 deliveries | DOH staffing data/ONS registrations | 4.3 | 2.34 | 0.5–18.3 | 58 |
| Number of midwives per 1000 deliveries | DOH staffing data/ONS registrations | 29.6 | 6.62 | 18.3–47.0 | 49 |
| Percentage of births to nulliparous women | ONS birth and death registrations | 41.0 | 4.17 | 32.4–58.6 | 64 |
| Percentage of births to teenage mothers | ONS birth and death registrations | 5.0 | 1.77 | 2.0–10.0 | 64 |
| Percentage of births to women >40 years old | ONS birth and death registrations | 2.2 | 0.75 | 1.0–4.7 | 64 |
| Percentage of births to fathers of manual or “other” class | ONS birth and death registrations | 50.4 | 10.69 | 27.0–72.3 | 64 |
| Mean Townsend deprivation score of babies born in hospital | 1991 Census and ONS registrations (Census data for enumeration district of residence of each birth) | 1.0 | 2.34 | −2.2–7.1 | 64 |
| Percentage of babies from multiple births | ONS birth and death registrations | 2.9 | 1.08 | 0.5–10.1 | 64 |
| Does unit have a 24 hour epidural service (see table 3)? | RCOG hospital recognition returns | – | – | – | 40 |
| Does unit have a dedicated maternity theatre (see table 3)? | RCOG hospital recognition returns | – | – | – | 40 |
| Does unit have a risk manager (see table 3)? | Thames risk management survey | – | – | – | 50 |
| Grade of risk manager (see table 3) | Thames risk management survey | – | – | – | 49 |
| Frequency of perinatal meetings (see table 3) | Thames risk management survey | – | – | – | 50 |