Table 3.

The psychiatric diagnoses and the distribution of the BDI score for case 1 and case 2 among patients with chronic musculoskeletal pain

Psychiatric assessment	Case 1 Depression	No psychiatric illness	Case 2 Other psychiatric illness	No psychiatric illness
BDI cut-off	n = 40	n = 9	n = 22	n = 9
BDI ≥ 13	35 (72%)	5 (10%)	19 (61%)	5 (16%)
BDI < 13	5 (10%)	4 (8%)	3 (10%)	4 (13%)

Notes: Case 1: depression compared with no psychiatric illness; case 2: other psychiatric illness irrespective of depression compared with no psychiatric illness. The figures given are percentages of the total within the group.

Abbreviation: BDI, Beck Depression Inventory.