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Table 1 Demographic data for the ISP-D test, retest, and validity samples

From: Web-based tools can be used reliably to detect patients with major depressive disorder and subsyndromal depressive symptoms

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
  1. * Statistical comparisons were made between retest responders and non-responders. All p values > 0.05.
  2. † Statistical comparisons were made between validity responders and non-responders. P value was shown when p < 0.05.
  3. NS: no significant statistical difference.
  4. ISP-D: Internet-based Self-assessment Program for Depression.