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Table 1 Overview of studies included in the systematic review

From: Statistical design and analysis in trials of proportionate interventions: a systematic review

First author

Date a

Therapeutic area

Country

Follow-up b

N c

Ell [54]

2010

Depression and anxiety

United States

12

387

Van’t Veer-Tazelaar [55]

2010

Depression and anxiety

The Netherlands

12

170

Braamse [56]

2010

Distress after autologous stem cell transplantation

The Netherlands

10

286

Patel [57]

2010

Depression and anxiety

India

12

2796

Gilliam [25]

2010

Obsessive–compulsive disorder

United States

3

14

Kay-Lambkin [58]

2010

Depression among methamphetamine users

Australia

5

8

Richter [18]

2011

Blood pressure

France, Hungary, Romania, Slovakia

6

256

Weiss d [32]

2011

Prescription opioid dependence

United States

6

653

Mitchell [16]

2011

Bulimia nervosa

United States

12

293

Seekles [59]

2011

Depression and anxiety

The Netherlands

6

120

Tolin [23]

2011

Obsessive–compulsive disorder

United States

3

34

van der Leeden [26]

2011

Anxiety in children

The Netherlands

6

133

Apil [60]

2012

Depression

The Netherlands

12

136

Karp [61]

2012

Depression and chronic pain

United States

12

250

Shortreed d [33]

2012

Schizophrenia

United States

18

1460

Dozeman [62]

2012

Depression and anxiety

The Netherlands

10

185

Nordin [24]

2012

Stress management of cancer patients

Sweden

12

300

Jakicic [11]

2012

Weight loss

United States

18

363

Wang d [34]

2012

Oncology

United States

7

150

Pommer [63]

2012

Depression and anxiety in patients with asthma or COPD

The Netherlands

24

160

Lamb [17]

2012

Whiplash injuries

England and Scotland

12

3851

Krebber [27]

2012

Distress in head and neck and lung cancer patients

The Netherlands

12

176

Borsari [21]

2012

Alcohol consumption

United States

9

598

Rose d [30]

2013

Smoking cessation

United States

6

606

Watson [13]

2013

Alcohol consumption

England and Scotland

12

529

Oosterbaan [29]

2013

Common mental disorders

The Netherlands

8

163

van Dijk [64]

2013

Depression among patients with diabetes and/or coronary heart disease

The Netherlands

12

236

Arving [65]

2013

Stress management of cancer patients

Norway

24

300

Mattsson [28]

2013

Depression and anxiety

Sweden

24

200

Carels [12]

2013

Weight loss

United States

4

52

van der Aa [66]

2013

Depression and anxiety

The Netherlands and Belgium

24

230

Kasari d [31]

2014

Communication for minimally verbal children with autism

United States

8

61

Muntingh [67]

2014

Panic and anxiety

The Netherlands

12

180

Kilbourne d [36]

2014

Mood disorder

United States

24

1600

Hamall [19]

2014

Families living with childhood chronic illness

Australia

6

1050

Gureje [68]

2015

Depression

Nigeria

12

1190

Stoop [69]

2015

Depression and anxiety in patients with diabetes, asthma or COPD

The Netherlands

18

46

Stam [20]

2015

Impairment in older dizzy people

The Netherlands

12

300

Lock [15]

2015

Anorexia nervosa

United States

6

45

Schuurhuizen [70]

2015

Distress in patients with metastatic colorectal cancer

The Netherlands

11

715

Haug [71]

2015

Panic and anxiety

Norway

12

173

Salloum [72]

2015

Post-traumatic stress in children

United States

3

53

Wu d [35]

2015

Bipolar disorder

United States

3

365

Painter [73]

2015

Depression in HIV patients

United States

12

249

  1. COPD chronic obstructive pulmonary disease
  2. aPublication date
  3. bFinal follow-up post baseline in months
  4. cSample size
  5. dOptimal-treatment strategy subcategory