Table 3 Sociodemographic and clinical predictors of chronic back pain

 Gender: Women (ref: men)

1.15

1.08–1.23

 Age

1.00

1.00–1.01

  Middle school

.98

.88–1.08

  High school

.91

.81–1.02

  Some college

.85

.75–.97

  College degree

.71

.63–.82

  Independent

1.29

1.00–1.67

  Executive

.97

.76–1.23

  Intermediary profession

1.15

.91–1.44

  Employee

1.08

.86–1.35

  Blue collar worker

1.20

.95–1.50

  Inactive

.94

.75–1.19

Relationship status: In a relationship (ref: single)

1.13

1.06–1.20

   < 20,000

.91

.82–99

  20,000 to 100,000

.88

.81–.97

   > 100,000

.84

.80–.90

  Any chronic pain (ref: absence)

3.46

3.26–3.68

  Any other medical condition (ref:absence)

1.32

1.24–1.41