Table 1.

Mean and median values of the BDI scores for groups having different psychiatric diagnoses (DMS-IV-RT) in patients with long-term sick leave due to chronic musculoskeletal pain

Psychiatric diagnosis (number of patients)	BDI score (mean/median values)	Percentage of the total (%)
Depression (n = 40)	28/26*	17
Mild (n = 12)	20/20	33
Moderate to severe (n = 24)	29/29	6
Extreme depression (n = 4)	48/44
Other psychiatric diagnoses (n = 22)	24/23	31
No psychiatric illness (n = 9)	18/21	13
Total (n = 71)	26/23**	100

Notes:

^*Comparisons between degrees of clinical depression: Kruskall–Wallis and median test, p < 0.005;

^**Group comparisons: Kruskall–Wallis test, p < 0.01 (clinical depression and other psychiatric illness vs no psychiatric illness).

Abbreviation: BDI, Beck Depression Inventory.