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Table 1 Table 1

From: The impact of missing components of the Acute Physiology Score on the standardized mortality ratio calculated by the APACHE III prognostic model

Missing

Observed dead

Predicted dead

SMR (95%CI)

Zero

183/934 (19.6%)

25.8%

0.76 (0.65–0.88)

One

565/3607 (15.7%)

19.6%

0.80 (0.73–0.87)

Two

952/9486 (10.0%)

13.7%

0.73 (0.69–0.78)

Three

978/11641 (8.4%)

10.4%

0.81 (0.76–0.86)

Four

753/8717 (8,6%)

9.8%

0.88 (0.82–0.95)

Five

579/6799 (8.5%)

9.5%

0.90 (0.82–0.97)

Six

127/1338 (9.5%)

10.1%

0.94 (0.79–1.12)

Seven or eight

14/85 (16.5%)

8.9%

1.85 (1.01–3.11)