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. 2016 Aug 2;16:364. doi: 10.1186/s12879-016-1707-8

Table 1.

Characteristics of the study population (children and adultsa) of Pienter-1 (1995–6) and Pienter-2 (2006–7)

Childrena Adultsa
Pienter-1 Pienter-2 Pienter-1 Pienter-2
N % N % N % N %
Total 1403 1484 2253 2023
Gender
 Men 755 53.81 754 50.81 1006 44.65 815 40.29
 Women 648 46.19 730 49.19 1247 55.35 1208 59.71
Age (median) 5 5 32 30
Ethnicityb
 Native Dutch 1201 85.60 897 60.44 2019 89.61 1689 83.49
 Western, other 74 5.27 57 3.84 131 5.81 152 7.51
 Moroccan/Turkish 57 4.06 202 13.61 47 2.09 50 2.47
 Surinamese/Aruban/Antillean 24 1.71 164 11.05 27 1.20 50 2.47
 Non-Western, other 47 3.35 164 11.05 29 1.29 82 4.05
Generation of migrantb
 Native Dutch 1201 85.60 897 60.44 2019 89.61 1689 83.49
 1st generation 41 2.92 286 19.27 123 5.46 174 8.60
 2nd generation 161 11.48 301 20.28 111 4.93 160 7.91
Degree of urbanization
 Very high 160 11.40 416 28.03 233 10.34 379 18.73
 Less high 1243 88.60 1068 71.97 2020 89.66 1644 81.27
Education levelc
 Moderate or low 955 68.07 1014 68.33 1794 79.63 1396 69.01
 High 421 30.01 431 29.04 436 19.35 601 29.71
 Unknown 27 1.92 39 2.63 23 1.02 26 1.29
Household
 1-2 persons 19 1.35 46 3.10 724 32.13 643 31.78
 3-4 persons 852 60.73 888 59.84 1086 48.20 1000 49.43
 > = 5 persons 520 37.06 515 34.70 408 18.11 356 17.60
 Unknown 12 0.86 35 2.36 35 1.55 24 1.19
Child in household attending day care
 No 1193 85.03 1154 77.76 1972 87.53 1694 83.74
 Yes 184 13.11 278 18.73 237 10.52 295 14.58
 Unknown 26 1.85 52 3.50 44 1.95 34 1.68
Child attending day care
 No 1091 77.76 1058 71.29 - - - -
 Yes 281 20.03 382 25.74 - - - -
 Unknown 31 2.21 44 2.96 - - - -
Ever had sexual intercourse
 No - - - - 206 9.14 266 13.15
 Yes - - - - 1932 85.75 1668 82.45
 Unknown - - - - 115 5.10 89 4.40

Numbers and percentages were unweighted

aChildren were aged 6 months to 11 years and adults were aged 17 to 44 years in Pienter-1 and 15 to 44 years in Pienter-2

bIn Pienter-2, migrant populations (people with at least one parent born abroad) were oversampled

cFor children, the education level of the parents was used