Table 1. Background characteristics of all children aged 0–9 months in experiment and control region, before (2010) and during (2011) the experiment.
| Background characteristics | |||||||
|---|---|---|---|---|---|---|---|
| 2010 | 2011 | ||||||
| Experiment | Control | p-value | Experiment | Control | p-value | ||
| Number of children | Number of children | n = 541 | n = 720 | n = 603 | n = 766 | ||
| Gender | Boys (%) | 289 (53,5) | 362 (50,3) | 0,269 | 331 (55,2%) | 398 (52,0) | 0,238 |
| Girls (%) | 252 (46,5) | 358 (49,7) | 269 (44,8%) | 368 (48,0) | |||
| missing | 0 | 0 | 3 | 0 | |||
| Country of origin mother | Netherlands | 372 (93,9) | 299 (92,1) | 0,251 | 553 (92,0) | 695 (91,2) | 0,010* |
| Western countries | 8(2,0) | 4 (1,2) | 8 (1,3) | 29 (3,8) | |||
| Non-western countries | 17 (4,3) | 22 (6,8) | 40 (6,7) | 38 (5,0) | |||
| missing | 145 | 395 | 2 | 4 | |||
| Country of origin father | Netherlands | 375 (95,4) | 298 (94,1) | 0,493 | 560 (94,0) | 700 (92,7) | 0,031* |
| Western countries | 3 (0,8) | 5 (1,5) | 6 (1,0) | 23 (3,0) | |||
| Non-western countries | 15(3,6) | 15 (4,7) | 30 (5,0) | 32 (4,2) | |||
| missing | 148 | 402 | 7 | 11 | |||
| Educational level mother | Low | 42 (10,8) | 19 (6,5) | 0,034* | 50 (11,0) | 58 (10,1) | 0,788 |
| Middle | 152 (39,0) | 106 (35,1) | 180 (39,5) | 221 (38,4) | |||
| High | 196 (50,3) | 177 (58,3) | 226 (49,5) | 297 (51,6) | |||
| missing | 196 | 418 | 147 | 190 | |||
| Educational level father | Low | 51 (13,3) | 36 (12,4) | <0,001* | 45 (10,1) | 75 (13,2) | 0,225 |
| Middle | 160 (41,8) | 82 (28,2) | 174 (39,1) | 201 (35,3) | |||
| High | 172 (44,9) | 173 (59,4) | 226 (50,8) | 294 (51,6) | |||
| Missing | 158 | 429 | 158 | 196 | |||
*Significant difference between experiment and control region.