Table 1.
Sociodemographic characteristics of all questionnaire participants, and stratified by those reached by postal and telephone invitation.
| Total (n = 892) |
Postal (n = 624) |
Telephone (n = 268) |
p value | ||||
|---|---|---|---|---|---|---|---|
| n (%) | Mean (SD) | n (%) | Mean (SD) | n (%) | Mean (SD) | ||
| Gender | |||||||
| Male | 441 (49) | 314 (50) | 127 (47) | .207 | |||
| Female | 451 (51) | 310 (50) | 141 (53) | ||||
| Ethnicity | |||||||
| Dutch | 264 (30) | 193 (31) | 71 (27) | .179 | |||
| Turkish | 207 (23) | 148 (24) | 59 (22) | ||||
| Moroccan | 169 (19) | 120 (19) | 49 (18) | ||||
| Surinamese | 252 (28) | 163 (26) | 89 (33) | ||||
| Age (years) | 50 (6.7) | 51 (6.6) | 49 (6.5) | .247 | |||
| 30–44 | 111 (12) | 60 (10) | 51 (19) | ||||
| 45–49 | 344 (39) | 235 (38) | 109 (41) | ||||
| 50–54 | 226 (25) | 162 (26) | 64 (24) | ||||
| 55–59 | 115 (13) | 90 (14) | 25 (9) | ||||
| 60–64 | 63 (7) | 51 (8) | 12 (5) | ||||
| 65 + | 33 (4) | 26 (4) | 7 (3) | ||||
| Predominant GP practice population | |||||||
| Dutch | 226 (25) | 165 (26) | 61 (23) | .024 | |||
| Mix | 127 (14) | 99 (16) | 28 (10) | ||||
| Non-Western | 539 (60) | 360 (58) | 179 (67) | ||||
| SES score | − 2.0 (2.5) | − 1.9 (2.4) | − 2.2 (2.6) | .043 | |||
| Average to higher (> 0) | 283 (32) | 204 (33) | 79 (29) | ||||
| Lower to average (0 till − 1.9) | 202 (23) | 144 (23) | 58 (22) | ||||
| Lower (− 2 till − 3.9) | 130 (15) | 94 (15) | 36 (13) | ||||
| Lowest (≤− 4) | 277 (31) | 182 (29) | 95 (35) | ||||