Table 3

Associations with sick leave during pregnancy, presented as crude odds ratios (OR) and adjusted OR (aOR) with the 95% confidence interval  (CI).

Independent variablesSick leave during pregnancy
Yes versus noIn any two or all three trimesters versus any one trimester only
Total, nOR (95% CI)aOR (95% CI)OR (95% CI)aOR (95% CI)
Chronic disorders
 Mood disorders*
  No
  Yes, non-medicated
  Yes, medicated		6446
199
41		Reference
1.82 (1.36 to 2.43)
4.11 (1.89 to 8.90)		Reference
2.05 (1.50 to 2.77)
3.14 (1.43 to 6.88)		Reference
1.69 (1.17 to 2.43)
2.28 (1.12 to 4.65)		Reference
1.77 (1.21 to 2.58)
2.27 (1.06 to 4.85)
 Asthma
  No
  Yes, non-medicated
  Yes, medicated		6369
96
221		Reference
2.33 (1.51 to 3.60)
1.40 (1.07 to 1.82)		Reference
2.22 (1.41 to 3.47)
1.32 (1.00 to 1.75)		Reference
1.35 (0.82 to 2.21)
1.66 (1.14 to 2.39)		Reference
1.74 (1.19 to 2.55)
1.33 (0.80 to 2.23)
 Allergy
  No
  Yes, non-medicated
  Yes, medicated		6098
339
249		Reference
1.55 (1.25 to 1.93)
1.62 (1.26 to 2.10)		Reference
1.51 (1.20 to 1.90)
1.49 (1.14 to 1.94)		Reference
1.28 (0.95 to 1.72)
1.51 (1.09 to 2.09)		Reference
1.38 (1.01 to 1.88)
1.50 (1.07 to 2.10)
 Hypothyroidism
  No
  Yes, non-medicated
  Yes, medicated		6426
17
243		Reference
1.81 (0.63 to 1.94)
1.50 (1.16 to 1.92)		Reference
2.68 (0.93 to 7.73)
1.41 (1.08 to 1.84)		Reference
0.74 (0.20 to 2.82)
1.11 (0.78 to 1.59)		Reference
0.87 (0.22 to 3.48)
1.25 (0.86 to 1.82)
Acute illnesses
 Nausea and vomiting
  No
  Yes, non-medicated
  Yes, medicated		1836
4060
790		Reference
1.27 (1.14 to 1.42)
2.29 (1.92 to 2.72)		Reference
2.49 (1.58 to 3.93)
4.52 (2.01 to 7.27)		Reference
1.26 (1.05 to 1.51)
2.30 (1.81 to 2.94)		Reference
1.95 (0.79 to 4.81)
3.69 (1.49 to 9.13)
 Pain†
  No
  pain, non-medicated
  Pain, medicated		852
2076
3.758		Reference
1.63 (1.39 to 1.91)
2.09 (1.80 to 2.43)		Reference
1.07 (0.85 to 1.36)
1.38 (1.11 to 1.71)		Reference
1.42 (1.05 to 1.92)
1.96 (1.46 to 2.62)		Reference
1.03 (0.66 to 1.60)
1.38 (0.91 to 2.10)
 Sleeping problems (SP)
  No
  SP, non-medicated
  SP, medicated		2938
3643
105		Reference
1.51 (1.38 to 1.67)
2.61 (1.79 to 3.93)		Reference
3.09 (1.91 to 5.00)
5.42 (2.88 to 10.22)		Reference
1.25 (1.07 to 1.46)
1.91 (1.82 to 3.08)		Reference
4.07 (1.19 to 13.92)
5.71 (1.53 to 21.34)

  • Missing data <5%, as presented in table 1.

  • *Depression and/or anxiety.

  • †Pain in the neck, back or pelvic girdle or headache.