Table 3 Risk classification comparing predicted and observed risks of the outcome using five groups of predicted probability, and associated likelihood ratios in each group. Data are from main model predicting acute end organ injury or death from 20 weeks' gestation until 42 days after birth (n = 634,290)

Very low risk

< 1.5

72 (3.66)

55,957 (8.85)

0.41

0.33–0.52

Low risk

1.5 to 3.0

834 (42.36)

403,060 (63.74)

0.66

0.61–0.72

Intermediate risk

3.0 to 5.0

408 (20.72)

108,085 (17.09)

1.21

1.09–1.35

High risk

5.0 to 15.0

485 (24.63)

58,854 (9.31)

2.65

2.40–2.92

Very high risk

> 15.0

170 (8.63)

6365 (1.01)

8.58

7.32–10.05

Total

1969 (100)

632,321 (100)