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Table 1 Distribution of participants according to age at baseline, predictor variables and outcome status, Finland

From: Adolescent reserve capacity, socioeconomic status and school achievement as predictors of mortality in Finland - a longitudinal study

Age at baseline and predictor variables in adolescence

Total population (n = 41,833)

Number of Deaths (n = 499)

Boys (n = 19,509)

Girls (n = 22,324)

Boys (n = 362)

Girls (n = 137)

No.

%

No.

%

No.

%

No.

%

Age at baseline (years)

 12

1976

10.1

1976

8.9

39

10.8

12

8.8

 14

6011

30.8

6575

29.4

97

26.8

34

24.8

 16

6285

32.2

7300

32.7

135

37.3

43

31.4

 18

5237

26.9

6473

29.0

91

25.1

48

35.0

Family SES (parents’ education)

 Higher education

3261

16.7

3573

16.0

35

9.7

19

13.9

 Secondary education

11,818

60.6

13,530

60.6

211

58.3

77

56.2

 Basic or lower

4425

22.7

5210

23.3

116

32.0

41

29.9

 No data

5

0.0

11

0.1

0

0.0

0

0.0

Perceived health

 Chronic disease

  No

17,791

91.2

20,134

90.2

312

86.2

119

86.9

  Yes

1718

8.8

2190

9.8

50

13.8

18

13.1

 Perceived stress symptoms

  None

9897

50.7

7144

32.0

156

43.1

35

25.5

  1/week

4181

21.4

5129

23.0

77

21.3

22

16.1

  2–3/week

3937

20.2

6442

28.9

77

21.3

47

34.3

  4–8/week

1494

7.7

3609

16.1

52

14.3

33

24.1

 Self-rated health

  Very good

7465

38.3

6233

27.9

117

32.3

27

19.7

  Average or good

11,637

59.6

15,568

69.7

229

63.3

99

72.3

  Poor

328

1.7

458

2.1

13

3.6

11

8.0

  No data

79

0.4

65

0.3

3

0.8

0

0.0

Health-promoting behaviour

 Physical activity

  Very active efficient exerciser

5114

26.2

3930

17.6

84

23.2

13

9.5

  Active efficient exerciser

6017

30.9

6623

29.7

105

29.0

44

32.1

  Occasional/low efficient exerciser

4645

23.8

7224

32.3

78

21.5

44

32.1

  Does not exercise

3671

18.8

4503

20.2

93

25.7

36

26.3

  No data

62

0.3

44

0.2

2

0.6

0

0.0

 Regular tooth brushing

  Several times/day

3982

20.4

10,831

48.5

53

14.6

69

50.4

  About once/day

9737

49.9

9689

43.4

161

44.5

54

39.4

  About 1–5 times/week or less

5689

29.2

1754

7.9

145

40.1

14

10.2

  No data

101

0.5

50

0.2

3

0.8

0

0.0

Social support

 Nuclear family (with both parents)

  Yes

15,366

78.8

17,040

76.3

250

69.1

96

70.1

  No

4022

20.6

5173

23.2

106

29.3

40

19.2

  No data

121

0.6

111

0.5

6

1.6

1

0.7

 Talking about issues to father

  Easy

10,421

53.4

8157

36.6

156

43.1

38

27.7

  Difficult

6010

30.8

8470

37.9

115

31.8

49

35.8

  Very difficult/No father

2571

13.2

5314

23.8

80

22.1

47

34.3

  No data

507

2.6

383

1.7

11

3.0

3

2.2

 Talking about issues to mother

  Easy

13,705

70.3

16,235

72.7

226

62.4

87

63.5

  Difficult

4429

22.7

4743

21.2

100

27.6

32

23.4

  Very difficult/No mother

1037

5.3

1175

5.3

31

8.6

16

11.6

  No data

338

1.7

171

0.8

5

1.4

2

1.5

 Talking about issues to friends

  Easy

14,764

75.7

20,078

89.9

258

71.3

120

87.6

  Difficult

3558

18.2

1772

7.9

69

19.0

14

10.2

  Very difficult/No friends

762

3.9

288

1.3

26

7.2

1

0.7

  No data

425

2.2

186

0.9

9

2.5

2

1.5

School achievement

 Highest

3217

16.5

5481

24.6

29

8.0

27

19.7

 2nd highest

5563

28.5

7590

34.0

82

22.6

37

27.0

 2nd lowest

6993

35.8

6482

29.0

148

40.9

34

24.8

 Lowest

3400

17.9

2577

11.5

101

27.9

37

27.0

 No data

246

1.3

194

0.9

2

0.6

2

1.5