Table 4

Proportional hazard model for major depression incidence

Variable

Coefficient

Hazard Ratio

Z Statistic

P-value

95% CI

Non-Food Allergies

0.14

1.2

1.41

0.16

0.9

-

1.4

Female

0.44

1.6

5.14

<.001

1.3

-

1.8

Age 12–18

1.15

3.2

2.82

<.001

1.4

-

7.1

Age 19–25

1.02

2.8

5.17

<.001

1.9

-

4.1

Age 26–45

0.86

2.4

4.80

<.001

1.7

-

3.3

Age 46–65*

0.57

1.8

2.98

<.001

1.2

-

2.6

Smoking

0.57

1.8

6.47

<.001

1.5

-

2.1

Childhood Stressors

0.71

2.0

8.08

<.001

1.7

-

2.4

Intercept

-0.20

-

-

-

-

-

* age > 65 in 1994 is the baseline category

Patten et al. BioPsychoSocial Medicine 2009 3:3   doi:10.1186/1751-0759-3-3