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Table 2 Baseline characteristics of included, eligible, and registered sample patients

From: Challenges in reaching patients with severe mental illness for trials in general practice—a convergent mixed methods study based on the SOFIA pilot trial

 

Included patients

Eligible patients

Register sample

Importance sampling

N

(%)

N

(%)

N

(%)

N

(%)

Total

92

 

119

 

17,229

 

3509

 

Psychiatic diagnosis†‽

 Severe depression

39

42.4

39

32.8

1488

8.6

1488

42.4

 Bipolar disorder

29

31.5

30

25.2

3182

18.5

1106

31.5

 Psychotic disorder

24

26.1

50

42.0

12,559

72.9

915

26.1

Sex†‽

 Male

31

33.7

52

43.7

8,699

50.5

1460

41.6

 Female

61

66.3

67

56.3

8,530

49.5

2049

58.4

Age†‡‽

 18–29

12

13.0

18

15.1

4369

25.4

715

20.4

 30–39

17

18.5

21

17.7

3505

20.3

635

18.1

 40–49

21

22.8

19

16.0

3128

18.2

592

16.9

 50–59

16

17.4

27

22.7

2998

17.4

663

18.9

 60–69

20

21.7

23

19.3

1883

10.9

450

12.8

 70 =  < 

6

6.5

11

9.2

1346

7.8

454

12.9

 Mean (SD)

48 (15.3)

 

50 (16.3)

 

44 (16.5)

 

47 (17.8)

 

Contacts to GP 2020†‽

 0–5

24

26.1

42

35.3

7694

44.7

1369

39.0

 6–10

26

28.3

22

18.5

3698

21.5

812

23.1

 11–15

18

19.6

22

18.5

2194

12.7

496

14.1

 16–20

6

6.5

12

10.1

1328

7.7

315

9.0

 20 < 

18

19.6

21

17.7

2315

13.4

517

14.7

Substance use disorder

 No

82

89.1

107

89.9

15,644

90.8

3242

92.4

 Yes

10

10.9

12

10.1

1585

9.2

267

7.6

N. Somatic comorbidities*†‡‽

 0

35

38.0

67

56.3

14,427

83.7

2827

80.6

 1

31

33.7

32

26.9

2073

12.0

486

13.9

  > 2

26

28.3

20

16.8

729

4.2

196

5.6

Income in 2020*†‽

  < 150.000 kr

25

27.2

41

34.5

6343

36.8

1080

30.8

 150.001–225.000 kr

29

31.5

48

40.3

7036

40.8

1323

37.7

 225.001–300.000 kr

16

17.4

20

16.8

2391

13.9

594

16.9

  > 300.000 kr

22

23.9

10

8.4

1459

8.5

512

14.6

Highest attained education 2020*†‽

 Primary school/not registered

23

25.0

60

50.4

8392

48.7

1279

36.5

 Secondary school

42

45.7

35

29.4

5683

33.0

1323

37.7

 Higher education

27

29.4

24

20.2

3154

18.3

907

25.9

Working status†‽

 Working

23

25.0

19

16.0

2183

12.7

696

19.8

 Out of work

54

58.7

82

68.9

13,249

76.9

2247

64.0

 Pensioners

15

16.3

18

15.1

1797

10.4

566

16.1

Civil status*†‽

 Single

58

63.0

93

78.2

13,141

76.3

2315

66.0

 Married/partner

34

37.0

26

21.9

4088

23.7

1194

34.0

  1. Significance level < 0.05
  2. *Significant p value between included and eligible patients
  3. Significant p value between included patients and registered sample
  4. Significant p value between included patients and the importance of sampling
  5. Significant p value between registered sample and the importance of sampling