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Table 1 Baseline characteristics, total K6 scores, and negative life events according to period on The Japan Environment and Children Study

From: The prevalence of psychological distress during pregnancy in Miyagi Prefecture for 3 years after the Great Eas t Japan Earthquake

 

2011H1

2011H2

2012H1

2012H2

2013H1

2013H2

p value

n

9513

12,004

13,569

13,405

14,659

13,002

 

Age

      

0.0009

 ≤ 24 years

9.86

9.83

9.46

9.40

9.35

9.32

 

 25–34 years

63.99

63.84

62.69

62.79

62.25

61.87

 

 ≥ 35 years

26.14

26.33

27.86

27.80

28.39

28.80

 

 Missing

0.01

0.00

0.00

0.01

0.01

0.01

 

Parity

      

< 0.001

 Primipara

37.60

37.70

38.29

38.65

38.90

41.16

 

 Multipara

58.54

59.24

58.35

58.85

58.01

57.59

 

 Missing

3.86

3.07

3.36

2.50

2.09

1.25

 

Marital status

      

0.0027

 Married

95.42

95.51

95.46

95.27

95.23

94.59

 

 Other

4.14

4.03

4.17

4.20

4.25

5.03

 

 Missing

0.44

0.46

0.37

0.53

0.52

0.38

 

Family income

      

< 0.001

 ≤ 199 × 104 JPY

5.78

5.49

5.65

5.36

5.33

5.08

 

 200–399 × 104 JPY

32.75

32.63

32.83

32.50

31.48

30.77

 

 400–599 × 104 JPY

31.22

31.22

29.91

31.00

31.55

31.56

 

 ≥ 600 × 104 JPY

24.02

24.34

24.70

24.29

25.16

27.07

 

 Missing

6.21

6.31

6.91

6.84

6.48

5.51

 

Education level

       

 Maternal

      

<0.0001

  Junior high school

7.72

7.49

7.57

7.18

7.39

7.31

 

  Senior high school

37.05

36.06

35.03

35.39

34.55

33.89

 

  College

54.34

55.66

56.39

56.39

57.04

57.63

 

  Missing

0.89

0.78

1.02

1.04

1.02

1.16

 

 Paternal

      

< 0.0001

  Junior high school

4.95

4.81

5.07

5.07

4.71

4.86

 

  Senior high school

30.84

31.87

30.21

30.76

29.75

28.75

 

  College

63.79

63.05

64.29

63.77

65.12

66.02

 

  Missing

0.42

0.27

0.43

0.41

0.42

0.37

 

Body mass index

      

< 0.0001

 < 18.5 kg/m2

16.11

15.80

15.90

17.00

15.64

16.91

 

 18.5–24.9 kg/m2

72.12

72.80

73.21

71.58

72.67

72.16

 

 ≥ 25 kg/m2

9.77

9.70

9.64

10.26

10.86

10.16

 

 Missing

2.00

1.70

1.25

1.16

0.83

0.77

 
 

2011H1

2011H2

2012H1

2012H2

2013H1

2013H2

p value

n

9513

12,004

13,569

13,405

14,659

13,002

 

Smoking

       

 Maternal

      

0.0005

  Yes

5.25

4.61

4.89

4.74

4.65

4.15

 

  No

94.06

94.52

94.23

94.26

94.55

95.23

 

  Missing

0.69

0.87

0.88

1.00

0.80

0.62

 

 Paternal

      

0.3362

  Yes

45.62

45.48

45.56

44.96

44.72

45.06

 

  No

52.63

52.80

52.63

53.18

53.70

53.42

 

  Missing

1.74

1.72

1.81

1.86

1.58

1.52

 

Alcohol intake

      

< 0.0001

 Yes

3.90

3.47

3.21

2.73

2.46

2.35

 

 No

95.58

95.96

96.15

96.14

96.35

96.77

 

 Missing

0.52

0.57

0.65

1.13

1.19

0.88

 

Feeling toward this pregnancy

      

0.9068

 Uneasy

7.98

7.47

7.66

7.50

7.74

7.40

 

 Other

91.73

92.19

92.02

92.14

91.95

92.31

 

 Missing

0.29

0.33

0.32

0.36

0.31

0.29

 

Past history of mental illness

      

0.452

 Yes

7.25

7.71

7.82

7.73

7.68

8.01

 

 No

92.75

92.29

92.18

92.27

92.32

91.99

 

Fetal number

      

< 0.0001

 Singleton

99.21

99.83

99.31

96.49

91.69

86.42

 

 Multiple

0.79

0.17

0.69

3.51

8.30

13.58

 

Number of times participating in JECS

      

< 0.0001

 1

99.99

99.83

99.32

96.51

91.74

86.42

 

 2

0.01

0.17

0.68

3.49

8.23

13.42

 

 3

0.00

0.00

0.00

0.00

0.03

0.16

 

Total scoring of K6 points

      

0.0598

 ≤ 4

78.10

78.87

77.57

77.64

76.92

77.40

 

 5–9

15.00

14.57

15.59

15.22

15.70

15.62

 

 10–12

3.63

3.49

3.32

3.51

3.78

3.37

 

 ≥ 13

3.27

3.07

3.52

3.63

3.60

3.62

 
 

2011H1

2011H2

2012H1

2012H2

2013H1

2013H2

p value

n

9513

12,004

13,569

13,405

14,659

13,002

 

Negative life events*1

      

< 0.001

 Yes

43.95

45.28

42.26

42.83

41.88

41.92

 

 No

55.30

54.01

56.86

56.54

57.42

57.50

 

 Missing

0.75

0.71

0.88

0.63

0.70

0.58

 

Classification of negative life events

       

 Bereavement

       

  Close blood relative

2.57

2.54

2.39

2.15

2.32

2.31

0.562

  Close friend

1.59

1.51

1.02

1.04

0.91

0.80

< 0.001

 Injury and illness

       

  Close blood relative

15.23

16.18

15.17

14.37

14.71

14.39

0.2155

  Dismissal

       

  Self

1.43

1.27

1.16

1.10

1.03

0.96

0.0305

  Husband

1.40

1.08

1.12

1.10

0.84

0.86

0.0003

 Enormous debt

0.95

0.92

0.87

0.86

0.85

0.88

0.8872

  Change of family structure

4.65

4.61

4.28

4.00

3.70

3.63

< 0.001

  Change of residence

9.60

9.81

10.04

9.91

10.68

10.48

0.0390

  Marital problems

9.93

10.25

9.77

10.50

9.69

10.16

0.2208

  Divorce

0.30

0.27

0.45

0.31

0.28

0.28

0.0762

  1. 2011H1 from May 2011 to October 2011, 2011H2 from November 2011 to April 2012, 2012H1 from May 2012 to October 2012, 2012H2 from November 2012 to April 2013, 2013H1 from May 2013 to October 2013, 2013H2 from November 2013 to April 2014
  2. Miyagi RC (Regional Center) was combined with inland and coast
  3. 13 RCs the 13 regional centers other than Miyagi RC and Fukushima RC
  4. *1 Negative life events in this survey refer to events within the past year at the time the survey was conducted
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Environmental Health and Preventive Medicine

ISSN: 1347-4715

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