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Read Now: News and Research From ICAAC 2014

Differences Between HIV-Infected Men and Women in Antiretroviral Therapy Outcomes -- Six African Countries, 2004-2012

November 29, 2013

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TABLE 1. Summary of Sampling Criteria and Methods* Used to Select Adult Antiretroviral Therapy (ART) Enrollees for Retrospective Cohort Studies Conducted -- Six African Countries, 2008-2012

Characteristic

Côte d'Ivoire

Swaziland

Mozambique

Zambia

Uganda

Tanzania

Total

Stage 1: Selection of study facilities

No. of ART clinics

124 by
Dec 2007

31 by
Dec 2009

152 by
Dec 2006

322 by
Dec 2007

286 by
Dec 2007

210 by
Dec 2007

 

No. of enrollees at ART clinics

36,943

50,767

43,295

65,383

45,946

41,920

 

Clinic eligibility criteria for study

Enrolled ≥50 adults on ART by Dec 2007

All ART initiation sites eligible

Enrolled ≥50 adults on ART by Dec 2006

Enrolled ≥300 adults on ART by Dec 2007

Enrolled ≥300 adults on ART by Dec 2007

Enrolled ≥300 adults on ART by Dec 2007

 

No. of study-eligible clinics

78

31

94

129

114

85

531

Estimated no. of study-eligible enrollees at clinics

36,110

50,767

42,234

58,845§

41,351§

37,728§

267,035

No. of clinics selected

34

16

30

6

6

6

98

Stage 2: Selection of study patients

Age at ART initiation criteria for study enrollees

≥15 yrs

≥15 yrs

≥15 yrs

≥18 yrs

≥18 yrs

≥18 yrs

 

Years of ART enrollment

2004-2007

2004-2010

2004-2007

2004-2009

2004-2009

2004-2009

 

Planned sample size

4,000

2,500

2,600

1,500

1,500

1,500

13,600

No. of eligible study enrollees

3,682

2,510

2,596

1,457

1,472

1,458

13,175

Date of data collection

Nov 2009 - March 2010

Nov 2011 - Feb 2012

Sept-Nov 2008

April-July 2010

April-July 2010

April-July 2010

 

* In Côte d'Ivoire, Swaziland, and Mozambique, study facilities were randomly selected using probability-proportional-to-size sampling. In Zambia, Uganda, and Tanzania, study facilities were purposefully selected to represent different types of ART facilities in each country.

† In all six countries, at each selected facility, a sample frame of study-eligible ART patients was created, and simple random sampling was used to select the desired sample size of patient medical records.

§ Estimate from available published data.

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This article was provided by U.S. Centers for Disease Control and Prevention. It is a part of the publication Morbidity and Mortality Weekly Report. Visit the CDC's website to find out more about their activities, publications and services.
 

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