Table 7 Multiple logistic regression for prediction of usage of interventional procedures

Physicians

 No

1.00

 Yes

0.67

0.54–0.83

<0.001

Age (y)

 25–34

1.00

 35–44

0.87

0.67–1.13

0.30

 45–54

1.48

1.11–1.97

0.007

 55–65

2.46

1.70–3.55

<0.001

Sex

 Female

1.00

 Male

1.46

1.03–2.08

0.04

Major diseases

 No

1.00

 Yes

3.16

2.00–4.98

<0.001

Urbanicity

 Urban

1.00

 Suburban

1.01

0.77–1.32

0.94

 Rural

1.60

0.98–2.61

0.06

Residential region

 North

1.00

 Central

0.80

0.59–1.08

0.14

 South

0.88

0.68–1.13

0.31

 East

0.46

0.19–1.08

0.07