BMC Public Health 2009, 9:221 http://www.biomedcentral.com/1471-2458/9/221 Table 3: Demographic characteristics of the survey respondents and study population in the housing areas studied Setting Alpha Setting Beta Setting Gamma Alpha-house n (%) Alpha-flat n (%) Beta-mix n (%) Beta-flat n (%) Gamma-house n (%) Gamma-flat n (%) Gender distribution Respondents Male Female Partial drop-outs: non- respondent gender Total Study population Male Female Total p-value Age distribution Respondents 20–34 years 35–64 years 65–79 years Partial drop-outs: non-respondent age Total Study population 20–34 years 35–64 years 65–79 years Total p-value Country of birth Respondents Born in Sweden Born elsewhere Partial drop-outs: non-respondent country of birth Total Study population Born in Sweden Born elsewhere Total p-value Years in school Respondents 1–9 years 10–12 years ≥ 12 years Partial drop-outs: non-respondent years in school Total Study population 1–9 years 10–12 years ≥ 12 years Total p-value No. of questionnaires delivered (N = 2510) Drop-out on account of deceased or moved (N = 34) Respondent rate (N = 1390, 56.1%) *χ2 test significant at p < 0.05. **χ2 test significant at p < 0.01. 108 (40.1) 141 (52.4) 20 (7.4) 269 514 (50.8) 497 (49.2) 1011 0.035* 21 (7.8) 170 (63.2) 74 (27.5) 4 (1.5) 269 131 (13) 654 (64.7) 226 (22.4) 1011 0.027* 253 (94.1) 15 (5.6) 1 (0.4) 269 939 (92.9) 72 (7.1) 1011 0.378 82 (30.5) 78 (29) 71 (26.4) 38 (14.1) 269 266 (26.3) 481 (47.6) 264 (26.1) 1011 0.001** 413 269 (65.1) 101 (42.1) 125 (52.1) 14 (5.8) 240 646 (48.9) 676 (51.1) 1322 0.246 56 (23.3) 132 (55) 50 (20.8) 2 (0.8) 240 406 (30.7) 695 (52.6) 221 (16.7) 1322 0.051 165 (68.8) 75 (31.3) 0 240 870 (65.8) 452 (34.2) 1322 0.375 98 (40.8) 74 (30.8) 26 (10.8) 42 (17.5) 240 564 (42.7) 632 (47.8) 126 (9.5) 1322 0.017* 518 139 (44.4) 163 (52.1) 11 (3.5) 313 632 (48.3) 677 (51.7) 1309 0.480 51 (16.3) 173 (55.3) 84 (26.8) 5 (1.6) 313 321 (24.5) 712 (54.4) 276 (21.1) 1309 0.004** 283 (90.4) 30 (9.6) 0 313 1188 (90.8) 121 (9.2) 1309 0.852 88 (28.1) 106 (33.9) 82 (26.2) 37 (11.8) 313 365 (27.9) 663 (50.6) 281 (21.5) 1309 0.001** 514 108 (46) 111 (47.2) 16 (6.8) 235 569 (48.2) 611 (51.8) 1180 0.766 59 (25.1) 98 (41.7) 74 (31.5) 4 (1.7) 235 362 (30.7) 529 (44.8) 289 (24.5) 1180 0.044* 186 (79.1) 48 (20.4) 1 (0.4) 235 891 (75.5) 289 (24.5) 1180 0.192 94 (40) 76 (32.3) 31 (13.2) 34 (14.5) 235 505 (42.8) 533 (45.2) 142 (12) 1180 0.116 443 68 (43.0) 85 (53.8) 5 (3.2) 158 280 (48.2) 301 (51.8) 581 0.409 25 (15.8) 87 (55.1) 45 (28.5) 1 (0.6) 158 97 (16.7) 328 (56.5) 156 (26.9) 581 0.897 136 (86.1) 20 (12.7) 2 (1.3) 158 503 (86.6) 78 (13.4) 581 0.843 55 (34.89) 62 (39.2) 26 (16.5) 15 (9.5) 158 171 (29.4) 312 (53.7) 98 (16.9) 581 0.064 231 240 (46.3) 313 (60.9) 235 (53) 158 (68.4) 77 (44.0) 82 (46.9) 16 (9.1) 175 507 (51.6) 476 (48.4) 983 0.461 35 (20) 95 (54.3) 40 (22.9) 5 (2.9) 175 280 (28.5) 515 (52.4) 188 (19.1) 983 0.08 115 (65.7) 56 (32) 4 (2.3) 175 612 (62.3) 371 (37.7) 983 0.212 71 (40.6) 63 (36) 19 (10.9) 22 (12.6) 175 438 (44.6) 447 (45.5) 98 (10) 983 0.493 391 175 (44.8) Page 6 of 11 (page number not for citation purposes)