The differential mediating effects of pain and depression on the physical and mental dimension of quality of life in Hong Kong Chinese adults

Table 1 Pain characteristics and means of depression and QoL measures

Pain measures	n (%)
Number of pain areas^a, M (SD)	3.81 (2.53)
0	30 (8)
1-2	95 (25)
3-5	164 (44)
6-9	75 (20)
10+	10 (3)
Pain locations^b
Shoulder	224 (60)
Head	199 (53)
Neck	176 (47)
Leg	166 (44)
Back	149 (40)
Hand	95 (25)
Stomach	93 (25)
Joint	75 (20)
Menstrual	73 (20)
Abdomen	63 (17)
Tooth	51 (14)
Chest	48 (13)
Others	12 (3)
Chronic Pain Grade classification^b
Grade 0	0
Grade I	107 (31.1)
Grade II	156 (45.3)
Grade III	65 (18.9)
Grade IV	4 (1.2)
Pain Intensity, M (SD)	56.41 (16.95)
Depression^c, M (SD)	7.63 (3.87)
Quality of life, M (SD)
SF12-MCS	35.72 (5.75)
SF12-PCS	35.80 (9.28)

Note: SF12: Medical Outcomes Study 12-item Short-Form Health Survey; MCS: Mental Component Score; PHS: Physical Component Score; M: Mean; SD: Standard deviation.
^a A total of 11 cases with missing data on the number of pain areas item.
^bOnly respondents with at least one pain location (n = 344) were included in the analyses. Twelve respondents with pain symptoms had missing data on the CPG items.
^cIndexed by Hospital Anxiety and Depression Scale Depression subscale. Higher scores indicate greater psychological distress.

ISSN: 1477-7525