Skip to main content

Table 2 Study interventions

From: The stepped wedge trial design: a systematic review

Lead Author

Date

Nature of Intervention

Level of 'stepping'

Is 'stepping' randomised?

Primary outcome measure

Gambia Hepatitis Study Group [4]

1987

Hepatitis B vaccination

Vaccination team

Yes

Liver cancer rates/Vaccine efficacy

Cook [17]

1996

Educational programme

Cohort

Yes

Health Behaviour Questionnaire measures

Wilmink [19]

1999

Screening programme

Surgery and Individual

Surgery – not stated; individual – yes

Incidence and mortality of RAAAs

Somerville [14]

2002

Improvements to housing

Sets of houses

Yes

Respiratory Health Symptoms

Fairley [15]

2003

Education programme and individual plans

Not stated

Yes

Proportion of missed doses

Hughes [12]

2003

Provision of Nevirapine to pregnant HIV+ women

Pre-natal clinic

Not stated

Mother to child HIV transmission

Levy [16]

2004

Education programme and individual plans

Individual

Yes

Proportion of missed doses

Priestly [22]

2004

Critical care outreach teams

Ward

Yes – in pairs

Rate of in-hospital deaths

Bailey [18]

2004

Provision of piped water to house yards

District

Not stated

Water quality

Grant [20]

2005

Screening and Isoniazid therapy

Individual

Yes

TB episodes >90 days after clinic entry

Ciliberto [21]

2005

Home-based therapy with ready to use therapeutic food

Rehab unit

Not stated

Attainment WHZ score >-2/Death

Chaisson [13]

2005

Screening and treatment for TB

Clinic

Yes

TB Incidence