Subjects missing information on the use of cod liver oil or multivitamin supplements in in the Nord-Trøndelag Health Study, in comparison with subjects with complete data who were included in the analysis

Subjects with complete dataSubjects with missing data
Subjects n16 9526614
Age at baseline years39.4±8.840.9±8.8
Body mass index kg·m−225.6±3.726.0±4.0
Female sex9421 (55.6)3648 (55.2)
Current smoking4640 (28.9)2124 (33.8)
Physical activity <1 h per week3702 (24.2)1632 (27.8)
Education <10 years3082 (18.3)1611 (24.7)
Social benefit recipients3069 (19.3)1005 (32.0)
Having economic difficulty5310 (31.7)1164 (34.8)
Family history of asthma2824 (17.7)614 (11.5)
  • Data are presented as mean±sd or n (%), unless otherwise stated.