Skip to main content

Table 6 Empirical validity at 6 months using self-reported general health

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

Measure at 6 months Categorisation of self-reported current health N Mean SD t-statistic p-value Relative efficiency
EQ-5D-3 L Very Good or Good 68 0.79 0.23 6.13 P < 0.001 1.57
  Fair, Poor or Very Poor 87 0.50 0.34
SF-6D Very Good or Good 67 0.76 0.14 7.69 P < 0.001
  Fair, Poor or Very Poor 88 0.60 0.12
  1. N is the sample size. SD denotes the standard deviation. Relative efficiency statistic is referenced at 1.0 for the EQ-5D-3 L. A relative efficiency value higher than 1.0 shows that the SF-6D is more efficient than the EQ-5D-3 L