Table 3

Descriptives of study population
Total New letter PHS letter No letter
N 1448 389 346 713
Age (SD) 24.1 (3.5) 24.0 (3.6) 23.9 (3.4) 24.3 (3.4)
Gender (male:female) 370:1078 103:286 88:258 179:534
education level
none or primary school 58 22 9 27
Pre-vocational secondary education (VMBO) 81 21 27 33
Secondary vocational education (MBO) 197 51 39 107
Senior general secondary education (HAVO) or Pre-university education (VWO) 382 105 96 181
Higher professional education (HBO) 264 76 70 118
University education (WO) 466 114 105 247

No significant difference between groups. All pā€™sā€‰>ā€‰.17.

ten Hoor et al.

ten Hoor et al. BMC Public Health 2013 13:1091   doi:10.1186/1471-2458-13-1091

Open Data