Table 2 Background characteristics of the participants, 6 month olds (n = 266)
Lotterya (n = 122) | Gift certificateb (n = 144) | Pc | Handwrittend address (n = 134) | Label addresse (n = 132) | Pc | |
|---|---|---|---|---|---|---|
Infant’s gender, n (%) | 0.98 | 0.22 | ||||
boy | 62 (51%) | 73 (51%) | 63 (47%) | 72 (55%) | ||
girl | 60 (49%) | 71 (49%) | 71 (53%) | 60 (45%) | ||
Geographical region, n (%) | 0.92 | 0.99 | ||||
Oslo/Akershus (capital region) | 28 (23%) | 34 (24%) | 30 (22%) | 32 (24%) | ||
Hedmark/Oppland | 10 (8%) | 10 (7%) | 10 (7%) | 10 (8%) | ||
South-Eastern Norway | 15 (12%) | 24 (17%) | 19 (14%) | 20 (15%) | ||
Agder/Rogaland | 21 (17%) | 19 (13%) | 19 (14%) | 21 (16%) | ||
Western Norway | 23 (19%) | 25 (17%) | 26 (19%) | 22 (17%) | ||
Trøndelag | 13 (11%) | 18 (13%) | 17 (13%) | 14 (11%) | ||
Northern Norway | 12 (10%) | 14 (10%) | 13 (10%) | 13 (10%) | ||
Mother’s age, years, n (%) | 0.53 | 0.033 | ||||
20–25 | 6 (5%) | 11 (8%) | 5 (4%) | 12 (9%) | ||
26–30 | 50 (41%) | 60 (42%) | 60 (45%) | 50 (38%) | ||
31–35 | 41 (34%) | 52 (36%) | 40 (30%) | 53 (40%) | ||
≥36 | 25 (20%) | 21 (15%) | 29 (22%) | 17 (13%) | ||
Employment prior to birth, mother, n (%) | 0.09 | 0.81 | ||||
Employed (full/part time) | 113 (93%) | 124 (86%) | 120 (90%) | 117 (89%) | ||
Not working | 9 (7%) | 20 (14%) | 14 (10%) | 15 (11%) | ||
Who filled in the questionnaire, n (%) | 0.26 | 0.12 | ||||
Mother | 114 (93%) | 129 (90%) | 126 (94%) | 117 (89%) | ||
Father/mother and father | 8 (7%) | 15 (10%) | 8 (6%) | 15 (11%) | ||
Mother’s educational level, n (%) | 0.77 | 0.46 | ||||
High school or lower | 35 (29%) | 39 (27%) | 40 (30%) | 34 (26%) | ||
College/university | 87 (71%) | 105 (73%) | 94 (70%) | 98 (74%) | ||
Father’s educational level, n (%)f | 0.17 | 0.94 | ||||
High school or lower | 63 (53%) | 63 (44%) | 64 (48%) | 62 (48%) | ||
College/university | 57 (48%) | 80 (56%) | 69 (52%) | 68 (52%) |