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Table 1 Pre-operative Characteristics of the Study and Simulation Cohorts

From: Impact of missing data on bias and precision when estimating change in patient-reported outcomes from a clinical registry

Characteristic Study Cohort (n = 5631) Simulation Cohort (n = 3000)
Age, mean (SD) 66.7 (9.9) 67.0 (9.2)
Sex (female) 3307 (58.7) 1754 (58.4)
Body Mass Index
 < 24.9 (underweight or normal weight) 632 (11.2) 314 (10.5)
 25.0–29.9 (overweight) 1696 (30.1) 912 (30.4)
 >  30 (obese) 3305 (58.7) 1774 (59.1)
High Blood Pressure 3020 (53.5) 1613 (53.8)
Back Pain 2074 (36.8) 1080 (36.0)
Diabetes 992 (17.6) 494 (16.5)
Depression 761 (13.5) 322 (10.7)
Heart Disease 663 (11.8) 329 (11.0)
  1. Frequencies and percentages [n (%)] reported for all categorical variables; SD Standard Deviation