Table 3 Multivariate Cox regression model for predictor of tension-type headache development

Sex

 Female

1.00

 Male

0.61

0.56-0.67

<0.001

Age

 <30

1.00

 30-39

1.56

1.25-1.94

<0.001

 40-49

1.58

1.27-1.96

<0.001

 50-59

1.76

1.42-2.18

<0.001

 ≥60

1.65

1.31-2.06

<0.001

Monthly Income

 <20,000

1.00

 20,000-39,999

1.34

1.14-1.56

<0.001

 ≥40,000

1.09

0.92-1.30

0.298

 Union/association member

1.51

1.27-1.80

<0.001

 Local government enrollee

1.35

1.14-1.60

<0.001

Region

 Northern

1.00

 Central

1.09

0.96-1.23

0.173

 Southern

1.50

1.35-1.67

<0.001

 Eastern

1.06

0.76-1.48

0.720

Comorbidy

 Hypertension

1.28

1.16-1.42

<0.001

 Epilepsy

0.79

0.56-1.11

0.170

 Major drpression disorder

1.73

1.47-2.03

<0.001

 Anxiety disorder

2.30

2.09-2.54

<0.001

Obstructive sleep apnea

 No

1.00

 Yes

1.18

1.06-1.31

0.003