Table 1 Patient characteristics (N = 117)

Age in years, Mean (SD)

43.4 (10.7)

Range 20–60

Sex, n (%)

 Male

48 (41.0)

 Female

69 (59.0)

Education^a, n (%)

 Low

28 (23.9)

 Middle

78 (66.7)

 High

11 (9.4)

BMI in kg/m², Mean (SD)

38.9 (6.0)

Range 30.4–56.6

BMI classification^b, n (%)

 Obesity class I (30–35.9 kg/m²)

32 (27.0)

 Obesity class II (35–39.9 kg/m²)

45 (39.0)

 Obesity class III (>  40 kg/m²)

40 (34.0)

Number of comorbidities, Mean (SD)

4.6 (3.2)

Range 0–14