Table 1 Descriptive statistics on case mix, staffing and incidents per organisation in the study period

Dates where data is available

13th April 2015–29th Feb 2020

13th April 2015–

29th Feb 2020

30th March 2016–

29th Feb 2020*

Total number admissions in time period

5,754

78,882

22,268

Proportion of the population > 40 years old averaged across all days

3.8%

3.0%

3.3%

Proportion of the population with any comorbidity averaged across all days

7.2%

8.2%

5.1%

Mean daily staffing levels

RM HPPD

12.65

5.02

6.89

Mean daily staffing levels

MA HPPD

5.22

2.11

2.58

Number of days out of total where RM staffing was below the mean (expected) level

61%

54%

54%

Average skill mix per day across the service

(RM staff hours/RM + MA hours)

0.71

0.69

0.73

Number of incidents that occurred in each service (per 100 admissions)

All incidents in Maternity setting

1423 (24.73)

8524 (10.81)

3108 (13.96)

Incidents associated with any harm

144 (2.50)

1677 (2.13)

667 (3.00)

Incidents rated > = moderate harm

30 (0.52)

52 (0.07)

80 (0.36)

Medicines incident

24 (0.42)

467 (0.59)

351 (1.58)

Stillbirth or neonatal death

30 (0.52)

111 (0.14)

Not available

Any type of delay

129 (2.24)

867 (1.10)

Not available

Haemorrhage

196 (3.41)

856 (1.09)

Not available

Third of fourth degree tear

196 (3.41)

570 (0.72)

Not available

Incident related to discharge

11 (0.19)

234 (0.30)

Not available

Reporting of low staffing or high workload

16 (0.28)

1151 (1.46)

81 (0.36)