Table 3 Regression data -characteristics (having had surgery vs. not having had surgery)

Region

 EUR^a

1

 US

0.41

0.02

10.01

0.582

 Japan

1.22

0.02

98.61

0.929

Age

1.00

0.98

1.02

0.764

Gender

 Female^a

1

 Male

1.08

0.76

1.55

0.669

BMI

0.99

0.95

1.03

0.637

Symptoms

 No anxiety/depression^a

1

 Anxiety/depression

1.10

0.71

1.70

0.659

Employment

 Working (full time & part time)^a

1

 Retired

1.36

0.78

2.36

0.28

 Other

1.48

0.81

2.72

0.20

Disease severity

 Mild^a

1

 Moderate

1.72

0.92

3.21

0.088

 Severe

4.09

2.08

8.04

 < 0.001

Physician satisfaction with medication

 Very satisfied^a

1

 Somewhat satisfied

0.80

0.45

1.45

0.467

 Neither satisfied nor dissatisfied

0.81

0.42

1.55

0.52

 Very/Somewhat dissatisfied

0.83

0.39

1.74

0.613