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Table 1 Characteristics of respondents by country of web community.

From: Cross-sectional survey of users of Internet depression communities

  UK* SE* DK* NO* DE* AT* Total Chi-square†
Number 529 453 382 291 330 52 2037  
Percent men (n) 29 (153) 26 (120) 27 (102) 31 (90) 37 (123) 27 (14) 30 (602) p = 0.02
Percent by age group (n)         
% <26 years (n) 29 (151) 29 (133) 17 (64) 40 (117) 23 (75) 25 (13) 27 (553)  
% 26–35 years (n) 33 (172) 35 (160) 36 (138) 33 (96) 30 (98) 27 (14) 33 (678)  
% 36–45 years (n) 22 (118) 22 (100) 25 (94) 19 (54) 25 (84) 29 (15) 23 (465)  
% >46 years (n) 17 (88) 13 (60) 23 (86) 8 (24) 22 (73) 19 (10) 17 (341) p < 0.001
% meeting criteria for major depression (n) 64 (339) 57 (257) 40 (153) 42 (121) 48 (158) 50 (26) 52 (1054) p < 0.001
  1. * UK = United Kingdom, SE = Sweden, DK = Denmark, NO = Norway, DE = Germany, AT = Austria. † Chi square test for heterogeneity between countries. Country – country comparisons: Differences in sex distribution (proportion of women) (Chi square test): SE>DE (p < 0.001); DK > DE (p < 0.01); UK > DE (p < 0.05). Differences in age distribution (rank sum test on 5 year age bands): UK-DK, UK-NO, UK-DE, SE-DK, SE-DE, DK-NO, NO-DE (p < 0.001); SE-NO, NO-AT (p < 0.01). Proportion depressed (Chi square test): UK > DK, UK > NO, UK > DE, SE > DK, SE > NO (p < 0.001); UK > SE, UK > AT, SE > DE, DE > DK (p < 0.05).