Testing the McSad depression specific classification system in patients with somatic conditions: validity and performance

Table 1 Characteristics of participants

	Diabetes	Cancer	*Diabetes vs. vancer*	Cancer-paper	Cancer vs. cancer-paper
N	114	195		241
Age, years
Mean (SD)	44 (14.1)	52 (10.9)	t (192) = 5.18**	65.3 (11.6)	t (412) = 11.7**
Range	20 - 73	22 - 77	p < .000	36-79	p < .000
Gender
women	82 (72%)	163 (84%)	χ ² (1) = 6.36	55 (24.2%)	χ² (1) = 145**
women	82 (72%)	163 (84%)	p = .013	55 (24.2%)	p < .000
Years since diagnosis
Median (IR)	13.5 (17)	3 (3)	t (128) = 8.52**	3 (3)	t (412) = 2.0
Range	0-56	1-31	p < .000	0-25	p = .057
Main co-morbidity
COPD, asthma	9 (7.9%)	19 (9.7%)	χ ² (1) = .32	17 (7%)	χ² (1) = 1.08
COPD, asthma	9 (7.9%)	19 (9.7%)	p = .57	17 (7%)	p = .30
Heart	8 (7.0%)	6 (3%)	χ ² (1) = 2.52	30 (12.3%)	χ² (1) = 12.32**
Heart	8 (7.0%)	6 (3%)	p = .11	30 (12.3%)	p = .00
Rheumatoid arthritis	5 (4.4%)	14 (7.2%)	χ ² (1) = .46	15 (6.2%)	χ² (1) = 177
Rheumatoid arthritis	5 (4.4%)	14 (7.2%)	p = .50	15 (6.2%)	p = .70
CES-D (depression)
Mean (SD)	14.31 (11.6)	16.09 (9.6)	t (190,535) = 1.34	9.9 (7.7)	t (352) = 7.0**
Range	0 – 50	0 – 45	p = .181	0-37	p = .000
PHQ-9 (depression)
Mean (SD)	6.41 (6.03)	6.43 (4.69)	t (187,889) = .071	-
Range	0 – 25	0 – 27	p = .943	-

(Columns in italics present results of t and chi-square tests concerning differences among groups).
* p < .05 / ** p < .01.

ISSN: 1477-7525