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Table 1 Characteristic of the included studies

From: Collaborative care for patients with depression and diabetes mellitus: a systematic review and meta-analysis

Author

Year

Country

Study design

Study period conducted

Setting

Age, mean (y)

Gender, male (%)

Ethnicity, white (%)

Randomized sample size (Intervention/control)

Follow-up

Loss to follow-up based on primary outcome (%)

Intention-to-treat analysis

Bogner et al. [26]

2012

US

RCT

From April 2010 to April 2011

3 Primary care practices

57

58 (32)

65 (36)

92/88

6, 12 wk

Intervention group: 0/92 (0%)

Used

Control group: 0/88 (0%)

Bogner et al. [27]

2010

US

RCT

From April 2007 to June 2008

1 Primary care practice

60

9 (16)

0 (0)*

29/29

6 wk

Intervention group: 0/29 (0%)

Not used

Control group: 0/29 (0%)

Ciechanowski et al. [31]

2006

US

RCT

Not clear

9 health maintenance organization clinics

58

112 (36)

248 (78)

160/164

3, 6, 12 mo

Intervention group: 0/160 (0%)

Used

Control group: 0/164 (0%)

Ell et al. [32]

2011

US

RCT

From August 2005 to August 2007

2 public safety-net clinics

Not clear**

69 (18)

Not clear***

193/194

6, 12, 18, 24 mo

Intervention group: 55/193 (28.5%)

Used

Control group: 68/194 (35.1%)

Katon et al. [19]

2010

US

RCT

From May 2007 to October 2009

14 Primary care clinics

57

103 (48)

169 (79)

106/108

6, 12 mo

Intervention group: 12/106 (11.3%)

Used

Control group: 16/108 (14.8%)

Katon et al. [23]

2004

US

RCT

From March 2001 to May 2002

9 Primary care clinics

58

115 (35)

260 (79)

164/165

3, 6, 9, 12 mo

Intervention group: 21/164 (13%)

Used

Control group: 16/165 (9.7%)

Kinder et al. [33]

2006

US

RCT

Not clear

Primary care clinics

58

115 (35)

248 (75)

164/165

6, 12 mo

Intervention group: 18/164 (11.0%)

Not used

Control group: 23/165 (13.9%)

Williams Jr et al. [28]

2004

US

RCT

From July 1999 to August 2001

18 Primary care clinics

70

194 (47)

265 (64)

205/212

3, 6, 12 mo

Intervention group: 5/205 (2.4%)

Used

           

Control group: 19/212 (9.0%)

 
  1. Abbreviations: mo month, SCL-20 Symptom Checklist-20, RCT Randomized Controlled Trial, US United States, wk week.
  2. *100% African American.
  3. **72% > =50 years.
  4. ***96% Hispanic.