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Table 1 Summary of the data extracted from the included studies (n = 58)

From: Interventions to improve the detection of depression in primary healthcare: systematic review

Areas of summary

Categories

Number of studies

Percent

Income level of countries of the included studies

 

High income

47

81.0

 

Middle income

5

8.6

 

Low income

6

10.3

Study design

 

RCT

18

31.0

 

Cluster RCT

7

12.1

 

Before-after (pre-post) with control group

5

8.6

 

Before-after (pre-post) with no control group

28

48.3

Number of intervention groups

 

One

28

48.3

 

Two

24

41.4

 

Three

3

5.2

 

More than three

3

5.2

Sample size

 

< 100

23

39.7

 

100–150

6

10.3

 

151–250

6

10.3

 

> 250

23

39.7

Types of participants

 

PHC workers

26

44.8

 

Patients attending PHC

16

27.6

 

PHC workers and patients attending PHC

16

27.6

Sampling technique

 

Purposive sampling

20

34.5

 

Convenience sampling

14

24.1

 

Random sampling

19

32.8

 

Sampling technique not clear

5

8.6

Type of intervention/treatment

 

Clinician training (education)

22

37.9

 

Screening

9

15.5

 

Feedback (disclosure of screening results)

7

12.1

 

Development and dissemination of guidelines/collaborative care package/quality improvement

10

17.2

 

Request for anti-depressants

1

1.7

 

Combination of interventions (education, screening, and feedback)

9

15.5

Outcome measure

 

Case vignette

5

8.6

 

Screening tool

36

62.1

 

Psychiatric interview

6

10.3

 

Document review (chart audit)

11

19.0

Global quality assessment of studies

 

Strong

14

24.1

 

Moderate

30

51.7

 

Weak

14

24.1

  1. RCT Randomized controlled trial, PHC Primary healthcare