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Table 1 Participation in relation to gender, age, marital status, and workplace.

From: Shiftwork in the Norwegian petroleum industry: overcoming difficulties with family and social life – a cross sectional study

   Invited Participated   
   Number Number Percent χ2
Total   3038 1697 55.9  
Gender Women 582 299 51.4 5.87*
  Men 2456 1398 56.9  
Age group 20 – 29 282 156 55.3 6.84
  30 – 39 701 403 57.5  
  40 – 49 1027 592 57.6  
  50 – 59 887 478 53.9  
  ≥ 60 141 68 48.2  
Marital status Married   1430   §
  Single   202   
Workplace Offshore 2406 1336 55.5 0.52
  Onshore 632 361 57.1  
  1. §No information was received about marital status. * p < .05