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Table 2 Distribution of JCQ indices by participants’ characteristics

From: Effect of maternal job strain during pregnancy on infant neurodevelopment by gender at 6 and 12 months: Mothers and Children’s Environmental Health (MOCEH) study

Characteristic Decision latitude (Job control) a Psychological job demands (Job demand) a Physical job demand b
Total Total Total
Low (n(%)) High (n(%)) Low (n(%)) High (n(%)) Low (n(%)) High (n(%))
Number of participants 158 (46.1) 185 (53.9) 154 (44.9) 189 (55.1) 217 (63.3) 126 (36.7)
Maternal age c 29.4 ± 3.1 30.7 ± 3.4 30.0 ± 3.4 30.2 ± 3.3 30.2 ± 3.2 29.9 ± 3.6
P-value <0.001   0.52   0.40  
≤30 years 106 (67.1) 102 (55.1) 90 (58.4) 118 (62.4) 126 (58.1) 82 (65.1)
>30 years 52 (32.9) 83 (44.9) 64 (41.6) 71 (37.6) 91 (41.9) 44 (34.9)
P-value 0.02   0.45   0.20  
Maternal
Education
      
≤ High school 33 (20.9) 25 (13.5) 28 (18.2) 30 (15.9) 33 (15.2) 25 (19.8)
≥ University 125 (79.1) 160 (86.5) 126 (81.8) 159 (84.1) 184 (84.8) 101 (80.2)
P-value 0.07   0.57   0.27  
Monthly family income       
< $2,000 22 (13.9) 19 (10.3) 20 (13.0) 21 (11.1) 26 (12.0) 15 (11.9)
$2,000-$4,000 90 (60.0) 75 (40.5) 81 (52.6) 84 (44.4) 106 (48.9) 59 (46.8)
< $4,000 46 (29.1) 91 (49.2) 53 (34.4) 84 (44.4) 85 (39.2) 52 (41.3)
P-value <0.001   0.17   0.92  
Sex       
Male 74 (46.8) 101 (54.6) 75 (48.7) 100 (52.9) 112 (51.6) 63 (50.0)
Female 84 (53.2) 84 (45.4) 79 (51.3) 89 (47.1) 105 (48.4) 63 (50.0)
P-value 0.15   0.44   0.77  
Birth Weight (kg) c 3.28 ± 0.34 3.37 ± 0.35 3.33 ± 0.35 3.32 ± 0.35 3.36 ± 0.36 3.27 ± 0.32
P-value 0.02   0.82   0.03  
Gestational age (weeks) c 39.1 ± 1.0 39.2 ± 1.1 39.3 ± 1.0 39.1 ± 1.1 39.2 ± 1.0 39.0 ± 1.1
P-value 0.67   0.23   0.07  
  1. aBased on Job Control and Job Demand scores of JCQ – low: < 50th percentile, high: ≥ 50th percentile.
  2. bLow: mothers who answered ‘strongly disagree’ or ‘disagree’ to the statement ‘my job requires lots of physical effort’.
  3. High: mothers who answered ‘agree’ or ‘strongly agree’ in the same statement.
  4. cValues were means ± SDs for continuous variables.
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