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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.