Table 1

Demographic data for the ISP-D test, retest, and validity samples

Variables

Test sample (n = 579)

Retest sample (n = 184)*

Validity sample (n = 55)†


Age (years)

NS

P < 0.001

Mean ± SD

26.5 ± 6.6

26.2 ± 6.6

29.7 ± 7.5

Range

18–52

18–49

18–51

Education (years)

NS

NS

Mean ± SD

14.9 ± 2.1

15.2 ± 1.9

15.3 ± 2.0

Range

0–21

9–21

9–18


%

%

%


Sex

NS

NS

Female

72.7

77.7

76.4

Male

27.3

22.3

23.6

Marital status

NS

NS

Married

18

18.5

23.6

Single

82

81.5

76.4

Employment status

NS

P = 0.027

Employed

51.8

48.4

67.3

Student

39.4

44.6

23.6

Unemployed

8.8

7.1

9.1


* Statistical comparisons were made between retest responders and non-responders. All p values > 0.05.

† Statistical comparisons were made between validity responders and non-responders. P value was shown when p < 0.05.

NS: no significant statistical difference.

ISP-D: Internet-based Self-assessment Program for Depression.

Lin et al. BMC Psychiatry 2007 7:12   doi:10.1186/1471-244X-7-12

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