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. Author manuscript; available in PMC: 2017 Aug 23.
Published in final edited form as: JAMA Surg. 2017 Jul 19;152(7):e171032. doi: 10.1001/jamasurg.2017.1032

Table 2.

Baseline Characteristics of Patients in the 1-Year Periods Before (Pre) and After (Post) the Enhanced Recovery After Surgery Implementation Across 20 Medical Centers in Kaiser Permanente Northern California

Characteristic Elective Colorectal Resection
Emergency Hip Fracture Repair
Pre (n = 1890) Post (n = 1878) P Valuea Pre (n = 2488) Post (n = 2514) P Valuea
Age, mean (SD), y 63.2 (14.2) 62.1 (14.0) .02 79.3 (11.9) 79.7 (11.7) .23

COPS2, mean (SD) 27.5 (30.8) 27.9 (30.1) .64 43.9 (40.7) 43.5 (40.0) .72

LAPS2, mean (SD) 20.2 (13.0) 19.7 (12.4) .22 57.0 (29.5) 58.0 (30.2) .21

Direct ICU admission, No. (%) 5 (0.3) 6 (0.3) .76 16 (0.6) 19 (0.8) .63

Elapsed time between admission and surgery, median (IQR), h 2.2 (1.8–2.9) 2.2 (1.7–2.9) .63 15.9 (6.1–23.6) 15.7 (6.3–23.0) .52

Duration of surgery, median (IQR), h 2.6 (1.9–3.6) 2.7 (2.0–3.9) .01 1.0 (0.7–1.4) 1.0 (0.7–1.4) .53

Abbreviations: COPS2, Comorbidity Point Score, version 2; ICU, intensive care unit; IQR, interquartile range; LAPS2, Laboratory and Acute Physiology Score, version 2.

a

P values for pre-post comparisons are based on 2-tailed, unpaired t test; χ2 test; or Wilcoxon rank sum test.