Table 2

Baseline characteristics of the LIFEWORK participants (n=88 466, 2011–2012)

CharacteristicWomenMenTotal
n%n%n%
n79 1629093041088 466100
Age (years), median, IQR50, 41–5854, 46–6151, 42–59
 19–29634780063477
 30–3910 485139611011 44613
 40–4920 4872622582422 74526
 50–6433 2264248545238 08043
 ≥65861611123113984711
 Missing100010
BMI (kg/m2), median, IQR24, 22–2726, 24–2825, 22–27
 Overweight (25–30 kg/m2)24 0933043334628 42632
 Obese (≥30 kg/m2)94461212961410 74212
 Missing45117215231
Marital status
 Married, registered partnership or living together62 7467975608170 30680
 Divorced43626440548025
 Widow(er)31944143133374
 LAT relationship21403164223043
 Single642289361073588
 Missing29806113590
Country of birth
 The Netherlands75 91995.9882194.884 74095.8
 Indonesia*5350.7880.96230.7
 Suriname4280.5160.24440.5
 Germany3860.5470.54330.5
 Belgium2510.3260.32770.3
 Former Netherlands Antilles†1050.1540.61590.2
 Other1 4261.82522.716781.9
 Missing1120.2001120.1
Level of urbanisation‡
 Very high11 3941415621712 95615
 High17 8962320412219 93722
 Moderate15 4431916891817 13219
 Low17 1192219472119 06622
 Very low16 8212120182218 83921
 Missing48914705361
Monthly income estimate§
 Low19002344422443
 Medium60 9707772287868 19877
 High13 0381713531414 39116
 Missing32544379436334
Highest level of education attained¶
 Low91941227893011 98314
 Intermediate37 2724727433040 01545
 High32 5064137654036 27141
 Missing1900701970
Employment status
 Self-employed3394412101346045
 Employed55 3097053485860 65769
 Retired71249173919886310
 Unemployed643121528581
 Sick leave/disability23093407427163
 Other: stay-at-home parent/voluntary work/student, and so on8463112493871210
 Missing19202136120562
Smoking status
 Never37 1824738564141 03846
 Former31 3184039954335 31340
 Current9700121 3571511 05713
 Missing962196110581
Alcohol consumption**
 Never53447199255436
 Current70 8428986119379 45390
 Ever27744478532524
 Missing20201602180
Mobile phone use
 Ever56 6217270347563 65572
 Never20 8172620322222 84926
 Missing17242238319622
Mobile phone use in past 3 months††
 <5 min/week11 6482011491612 79720
 5–29 min/week23 5394225933726 13241
 30–59 min/week92601613782010 63817
 1–3 hours/week715513107815823313
 4–6 hours/week18493474723234
 ≥6 hours/week11222362514842
 Missing204840020483
Years of mobile phone use‡‡
 ≤4 years33306212335426
 5–9 years25 2824529274228 20944
 10–14 years714313222532936815
 ≥15 years12 564228761213 44021
 Missing83021479411909614
  • *Indonesia including former Dutch East Indies.

  • †Aruba, Bonaire, Curacao, St Martin, St Eustatius.

  • ‡Average number of addresses/km2 on postal code level within a radius of 1 km of the home address at LIFEWORK baseline; categorised into five levels ranging from very high=on average >2500 addresses/km2; high=on average 1500–2500 addresses/km2; moderate=on average 1000–1500 addresses km2; low=on average 500–1000 addresses/km2; and very low=on average <500 addresses/km2.38

  • §Household income was estimated based on participants’ baseline postal code. Each postal code was linked to income data from Statistics Netherlands for December 2008; the cut-off values for low income and high income were respectively the 40th and 80th percentiles in income.38

  • ¶Low: primary school, lower vocational training or lower secondary education; intermediate: intermediate vocational education or intermediate/higher secondary education; high: higher vocational education or university degree.

  • **Current: more than one glass per week in the past 12 months; ever: less than one glass per week in the past 12 months.

  • ††Calculated among the participants who reported using a mobile phone in the 3 months prior to baseline (n=57 644).

  • ‡‡Calculated among the participants who reported having ever used a mobile phone (n=63 655) for the year 2012.

  • BMI, body mass index; LAT, living-apart-together.