Table 2.
Characteristics of respondents and non-respondents
| Respondents (%) | Non-respondents (%) | chi2 | p-value | |
| Sex | ||||
| Female | 65/239 (27) | 84/222 (38) | 5.4813 | 0.019 |
| Male | 174/239 (73) | 138/222 (62) | ||
| Work place | ||||
| Practice | 102/239 (44) | 94/222 (42) | 6.1877 | 0.045 |
| Hospital | 109/239 (47) | 123/222 (55) | ||
| University Hospital | 23/239 (10) | 10/222 (5) | ||
| Other | 5/239 (2) | 0 | ||
| Size of the city (work place) | ||||
| <20,000 | 49/239 (21) | 66/222 (30) | 21.040 | <0.001 |
| 20,000–100,000 | 92/239 (38) | 43/222 (19) | ||
| 100,000–250,000 | 39/239 (16) | 41/222 (18) | ||
| >250,000 | 59/239 (25) | 72/222 (32) | ||
| Zip code* | ||||
| 1 | 72/237 (30) | 67/222 (30) | 0.2586 | 0.88 |
| 2 | 68/237 (29) | 69/222 (31) | ||
| 3 | 97/237 (41) | 88/222 (40) |
* Two questionnaires returned without code-number