Table 4

Working conditions from pregnant workers at 16 and 24 weeks of pregnancy*

16 weeks of pregnancy24 weeks of pregnancy
Intervention group n=119Control group n=122RR95% CIP valueIntervention group
n=97
Control group n=108RR95% CIP value
Working times
 Hours/week†34.4 (7.4) (6–50)33.4 (9.1) (8–50)0.38233.6 (8.6) (4–48)32.1 (9.5) (6–60)0.590
 Days/week†4.3 (0.8) (2–6)4.1 (1) (1–7)0.1844.4 (0.1) (0–6)4.2 (0.8) (0–6)0.400
Irregular working times17 (14%)18 (15%)0.89712 (12%)17 (16%)0.489
 Evening shifts‡17 (12.4) (10.6)17 (6.7) (12.3)0.90211 (22.3) (3.2)14 (19.9) (2.2)0.723
 Night shifts‡18 (9) (7.5)18 (3) (6.3)0.9572 (2.2) (1.9)4 (2.7) (1.5)0.686
Physical work
 Standing/walking ≥4 hours/day37 (32%)41 (35%)0.67832 (32%)33 (34%)0.833
 Lifting/carrying loads or people33 (28%)31 (25%)0.71218 (19%)20 (19%)0.994
Physical work: regularly/often
 Bending28 (24%)25 (21%)0.59219 (20%)26 (24%)0.438
 Physically very demanding24 (19%)17 (14%)0.35115 (16%)17 (16%)0.957
 Requiring physical strength19 (16%)14 (12%)0.32314 (14%)10 (9%)0.250
Job strain: often/always
 Problems with pressure17 (14%)32 (26%)0.550.32 to 0.910.02111 (11%)17 (16%)0.360
 Like to take things a little easier23 (19%)38 (31%)0.620.40 to 0.980.03523 (24%)28 (26%)0.714
 Freedom in performance of tasks83 (70%)93 (76%)0.25761 (63%)85 (79%)0.570.37 to 0.900.013
 Influence on the pace to work57 (48%)67 (55%)0.30350 (52%)60 (58%)0.359
 Planning own work75 (63%)77 (63%)0.97559 (61%)70 (65%)0.555
 Support from manager66 (56%)80 (66%)0.09155 (57%)67 (62%)0.437
 Enjoy working93 (78%)111 (91%)0.860.77 to 0.960.00676 (79%)100 (93%)0.340.16 to 0.740.003
 Finds work satisfying93 (78%)113 (93%)0.840.76 to 0.940.00173 (75%)98 (91%)0.370.19 to 0.740.003
Exposed to biological agents36 (30%)33 (27%)0.61024 (35%)29 (27%)0.200
Exposed to chemical agents9 (8%)7 (6%)0.5819 (9%)7 (7%)0.456
Noise40 (34%)32 (26%)0.22632 (33%)31 (29%)0.507
  • *Complete results in online supplemental file C.

  • †Mean (SD) (min-max).

  • ‡n, mean hours/week (SD), all other variables mentioned as n (%).

  • RR, relative risk.