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Table 1 Number of variables and instruments per domain used in studies

From: Variety in mental health research data: when does more become too much?

 

Domains

Number of different variables/instruments

Use per type of study

Total (average use per variable/instrument)

    

Effect (N = 46)

Other (N = 46)

  

Variables

         
 

Demographic

30

24%

74

37%

67

43%

141 (4.8)

39%

 

Diagnostic

51

41%

59

30%

47

30%

106 (2.2)

30%

 

Treatment/intervention

39

31%

63

32%

43

27%

106 (2.8)

30%

 

Effect

4

3%

4

2%

0

0%

4 (1)

1%

 

Total

124

100%

200

100%

157

100%

357 (3.1)

100%

Instruments

         
 

Demographic

0

0

0

0

    
 

Diagnostic

112

50%

59

25%

78

60%

137 (1.2)

37%

 

Treatment/intervention

1

0%

0

0%

1

1%

1 (1)

0%

 

Effect

110

49%

177

75%

52

40%

229 (2.1)

62%

 

Total

223

100%

236

100%

131

100%

367 (1.6)

100%