Occurrence of mood disturbances

Study group

Control group

RR

95%

conf. limit

n = 75

n = 178

Chronic depression

28%

14%

2.1

1.3 - 3.5

Other mood disturbance

7%

2%

6.6

2.6 - 16.5

Serious mood disturbance

4%

1%

6.0

1.4 - 14.3

None

61%

83%

-

-