Table 5 Comparison between socio-demographic characteristics of mail and Web survey respondents
From: Self-reported data in environmental health studies: mail vs. web-based surveys
Socio-demographic characteristics a | All respondents | Web | p-value b | ||
|---|---|---|---|---|---|
Sex | Male | 518 | 352 (45) | 166 (61) | < 0.0001 |
Female | 546 | 438 (55) | 108 (39) | ||
Missing | 2 | 1 | 1 | Â | |
Age (years) |  | 59.3 ± 14.5 | 60.8 ± 14.9 | 55.1 ± 12.7 | < 0.0001 |
Missing | 6 | 3 | 3 | Â | |
Smoking status | No smoker | 511 | 370 (47) | 141 (52) | 0.403 |
Current smoker | 158 | 118 (15) | 40 (14) | ||
Previous smoker | 351 | 263 (34) | 88 (32) | ||
Passive smoker | 38 | 32 (4) | 6 (2) | ||
Missing | 8 | 8 | 0 | Â | |
Childhood living environment | Town | 223 | 168 (21) | 55 (20) | 0.192 |
Village | 428 | 305 (39) | 123 (46) | ||
Countryside | 402 | 308 (40) | 94 (34) | ||
Missing | 13 | 10 | 3 | Â | |
Years living in the region |  | 35.3 ± 20.7 | 36.3 ± 21.0 | 32.4 ± 19.6 | 0.006 |
Missing | 19 | 15 | 4 | Â | |
Period outside of home | Short period (less than 14 days) | 405 | 317 (41) | 88 (32) | 0.010 |
Medium period (14–55 days) | 553 | 402 (51) | 151 (55) | ||
Long period (56 days or more) | 98 | 63 (8) | 35 (13) | ||
Missing | 10 | 9 | 1 | Â | |
Education | Elementary school | 174 | 149 (19) | 25 (9) | 0.002 |
High school | 32 | 26 (3) | 6 (2) | ||
College | 316 | 224 (29) | 92 (34) | ||
Short or medium higher education (1–4 years) | 425 | 309 (39) | 116 (42) | ||
Long higher education (≥ 5 years) | 109 | 74 (10) | 35 (13) | ||
Missing | 10 | 9 | 1 | Â | |
Job situation | Employed | 533 | 350 (44) | 183 (66) | < 0.0001 |
Unemployed | 16 | 11 (2) | 5 (2) | ||
Out of job market | 513 | 427 (54) | 86 (32) | ||
Missing | 4 | 3 | 1 | Â | |
Job position | Informed | 966 | 707 (89) | 259 (94) | 0.019 |
Not informed | 100 | 84 (11) | 16 (6) | ||