Table 7 Observed and predicted length of ICU stay and ICU length of stay ratio for non-operative patients

< 18.5

1.71 (0.87–3.80)

4.38 (2.82–6.15)

0.45 (0.24–0.87)

18.5–24.9

1.65 (0.87–3.62)

4.01 (2.70–5.82)

0.44 (0.25–0.90)

25.0–29.9

1.63 (0.90–3.58)

4.13 (2.71–5.83)

0.45 (0.25–0.87)

30.0–39.9

1.73 (0.91–3.71)

4.08 (2.83–5.87)

0.46 (0.25–0.91)

≥ 40.0

1.94 (0.92–4.34)

4.39 (3.05–6.25)

0.49 (0.28–0.93)