Table 1

Patient characteristics of the 10 642 included patients in the case-control analysis

VariableGastric bypass
(n=5321)		Controls
(n=5321)		Standardized difference (%)
Gender
 Male2098 (39.4%)1926 (36.2%)0.0
 Female3223 (60.6%)3395 (63.8%)0.0
Age
 Years49.0 (9.5)47.1 (11.5)12.2
BMI
 kg/m242.0 (5.7)40.9 (7.3)11.7

  • Standardized difference, ie, difference in proportions divided by SE; imbalance defined as absolute value >20 (small effect size).