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Table 1 Descriptive statistics on weighted vs. un-weighted confounders

From: Evaluation of the use of Swedish integrated electronic health records and register health care data as support clinical trials in severe asthma: the PACEHR study

Variable EHR (unweighted) EHR (weighted) RCT total population
n Mean (SD %) n Mean (SD %) N Mean (SD %)
Age 240 50.3 (14.8) 239 50.6 (23.7) 451 50.1 (12.3)
BMI (kg/m2) 239 28.0 (5.8) 239 27.0 (7.6) 451 27.3 (4.9)
FEV (% predicted) 240 84.1 (19.0) 239 63.1 (31.8) 450 68.7 (18.0)
GINA 5 n (%) 240 101.0 (42.1%) 239 70.0 (13.3%) 451 77.0 (17.1%)
Male n (%) 240 76.0 (31.7%) 239 106.1 (40.1%) 451 155.0 (34.4%)
Neutrophils (unit) 77 6.2(2.8) 77 6.0 (2.8) 426 4.7 (2.0)
One year Pre-index Exacerbations rate 240 3.0 (1.6) 239 2.5 (1.5) 451 2.6 (0.9)
  1. Weighted and unweighted patient characteristics of the EHR population compared to the combined placebo and treatment groups in RCT