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Table 2 Case mix, outcome and activity for obstetric and non-obstetric admissions to critical care units

From: Case mix, outcome and activity for obstetric admissions to adult, general critical care units: a secondary analysis of the ICNARC Case Mix Programme Database

  All obstetric admissions (n = 1902) Direct obstetric admissions (n = 1452) Indirect or coincidental obstetric admissions (n = 450) Female nonobstetric admissions aged 16–50 years (n = 22,938)
Case mix     
   Age (years)a 30 (25–34) [16–50] 30 (25–34) [16–47] 29 (24–34) [16–50] 37 (28–44) [16–50]
   APACHE II APSb,d 10.8 (5.5) [0–41] 10.7 (5.3) [0–41] 11.2 (5.8) [0–34] 12.7 (6.9) [0–50]
   APACHE II scored 10.9 (5.5) [0–41] 10.8 (5.4) [0–41] 11.4 (6.0) [2–39] 13.7 (7.3) [0–50]
   Surgical statusc     
Nonsurgical 862 (45.4) 630 (43.4) 232 (51.6) 16,246 (70.9)
Elective surgery 145 (7.6) 75 (5.2) 70 (15.5) 3550 (15.5)
Emergency surgery 893 (47.0) 745 (51.4) 148 (32.9) 3123 (13.6)
Outcome     
   Mortalityc     
CMP unit (ICU) 44 (2.3) 25 (1.7) 19 (4.2) 3372 (14.7)
Any hospitale 58 (3.1) 32 (2.2) 26 (6.0) 4206 (19.6)
Activity     
   Length of stay (days)     
CMP unit (survivors) 1.1 (0.7–2.3) [0–72] 1.1 (0.7–2.1) [0–41] 1.1 (0.6–2.7) [0–72] 1.5 (0.8–3.8) [0–209]
CMP unit (nonsurvivors) 1.3 (0.5–4.5) [0–59] 1.1 (0.3–10.3) [0–59] 1.5 (0.6–3.2) [0–21] 1.8 (0.7–5.2) [0–165]
Any hospitale (survivors) 10 (6–15) [0–417] 9 (6–14) [1–417] 11 (6–20) [0–373] 12 (6–27) [0–767]
Any hospitale (nonsurvivors) 4.5 (2–13) [0–79] 6 (1.5–14) [0–62] 3.5 (2–10) [0–79] 5 (2–16) [0–669]
   Readmissionsc 17 (0.9) 7 (0.5) 10 (2.2) 945 (4.1)
  1. Values are expressed as amedian (interquartile range) [range], bmean (standard deviation) [range], or cn (%). dAcute Physiology and Chronic Health Evaluation (APACHE) II exclusions: age <16 years, stay <8 hours, readmission within same hospital stay, transfer from another intensive care unit (ICU), admission following coronary artery bypass grafting, and admission for primary burns. eExcluding readmissions within the same hospital stay. APS, Acute Physiology Score; CMP, Case Mix Programme.