Table 1 Characteristics of 692 children born in 2010, not registered with the 5-year booster
| Â | All | Participants | Non-participants | P |
|---|---|---|---|---|
Sex | ||||
 Male | 347 (50%) | 179 (53%) | 168 (48%) | 0.196 |
 Female | 345 (50%) | 161 (47%) | 184 (52%) |  |
Origin | ||||
 Danish | 426 (62%) | 217(64%) | 209 (59%) | 0.432 |
 Second generation immigrants | 121 (17%) | 54 (16%) | 67 (19%) |  |
 Immigrants | 145 (22%) | 69 (20%) | 76 (22%) |  |
District | ||||
 Amager | 153 (22%) | 76 (22%) | 77 (22%) | 0.014 |
 Østerbro | 119 (17%) | 67 (18%) | 52 (15%) |  |
 Brønshøj-Husum | 79 (11%) | 30 (9%) | 49 (14%) |  |
 Vesterbro - Kgs. Enghave | 83 (12%) | 54 (16%) | 29 (8%) |  |
 Nørrebro | 75 (11%) | 35 (10%) | 40 (11%) |  |
 Bispebjerg | 59 (9%) | 24 (7%) | 35 (10%) |  |
 Valby | 51 (7%) | 20 (6%) | 31 (9%) |  |
 København K | 37 (5%) | 19 (6%) | 18 (5%) |  |
 Vanløse | 28 (4%) | 13 (4%) | 15 (4%) |  |
 Unknown | 8 (1%) | 2 (1%) | 6 (2%) |  |