Table 1.
Characteristics of pregnant workers in public administration and hospitals in Denmark, 2007–2013.
N = 16,501.
Table 2.
Odds ratios of preterm birth by number of night shifts during the first and second trimesters among workers in public administration and hospitals in Denmark, 2007–2013.
[OR = odds ratio; CI = confidence interval].
Table 3.
Odds ratios of preterm birth by duration of night shifts during the first and second trimester among workers in public administration and hospitals in Denmark, 2007–2013.
[OR = odds ratio; CI = confidence interval].
Table 4.
Odds ratios of preterm birth by consecutive night shifts during the first or second trimester among workers in public administration and hospitals in Denmark, 2007–2013.
[OR = odds ratio; CI = confidence interval].
Table 5.
Odds ratios of preterm birth by number of quick returns a and quick returns after a night shift b during the first and second trimester among workers in public administration and hospitals in Denmark, 2007–2013.
[OR = odds ratio; CI = confidence interval].
Fig 1.
Selection out of/into night work from 1st to 2nd trimesters and odds of preterm birth.
Crude and adjusted analysis. Adjusted for parity, age of mother, pre-pregnancy BMI, smoking during pregnancy and sick leave 3 months before during pregnancy.