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Table 3 Known groups validity – APACHE II scores

From: Psychometric properties of Patient Reported Outcome Measures (PROMs) in patients diagnosed with Acute Respiratory Distress Syndrome (ARDS)

  APACHE score < =26 mean (SD) APACHE score < =26 n APACHE score >26 Mean (SD) APACHE score >26 n Difference P value Confidence intervals Cohen’s D
EQ-5D-3 L (Utility) 0.61 (0.35) 195 0.47 (0.40) 28 0.14 0.058 −0.05 0.28 0.38
SF-6D (Utility) 0.64 (0.15) 191 0.62 (0.16) 27 0.05 0.155 −0.02 0.12 0.29
SF-12 PCS 36.90 (12.45) 185 36.70 (11.51) 24 0.20 0.942 −5.09 5.48 0.02
SF-12 MCS 45.99 (13.24) 185 41.12 (13.21) 24 4.87 0.001 −0.79 10.55 0.37
SGRQ Symptoms Score 33.04 (28.00) 194 38.57 (27.05) 27 −5.54 0.334 −16.83 5.75 0.20
SGRQ Activity Score 45.91 (31.26) 169 48.63 (36.07) 24 2.72 0.696 −16.44 10.99 0.09
SGRQ Impact Score 22.08 (22.46) 169 22.49 (22.65) 25 0.41 0.932 −9.91 9.09 0.02
SGRQ Total Score 31.95 (23.97) 154 33.04 (26.29) 21 1.09 0.847 −12.22 10.05 0.04
  1. SD denotes standard deviation