Supplementary Materials for Web Appendix

Supplementary materials for web appendix

A1. Question wording from all surveys

We use three questions from each study to define the indicators used in paper: the number of partners reported in the last 12 months, and the dates of first and last sex with each partner. The exact question wording for each is shown below. “Qnum” refers to the number of the question, which for DHS is sex specific.

Number of partners in the last 12 months

Country / Survey / Year / Qnum M,F / Wording
Kenya / DHS / 2008 / 429, 639 / In total, with how many different people have you had sexual intercourse in the last 12 months?
PSI / 2011 / 210 / In the past 12 months, how many partner(s), including marital partners, have you had sex with
Lesotho / DHS / 2009 / 429, 639 / In total, with how many different people have you had sexual intercourse in the last 12 months?
PSI / 2008 / 305 / How many sexual partners have you had in the past 12 months (including your spouse or cohabiting partners)
Uganda / DHS / 2006 / 429, 639 / In total, with how many different people have you had sexual intercourse in the last 12 months?
PSI / 2008 / 430 / Considering all types of partners including marital partners how many people overall have you had sex with in the last 12 months?
Zambia / DHS / 2007 / 430, 639 / In total, with how many different people have you had sexual intercourse in the last 12 months?
PSI / 2009 / D105 / With how many people have you had sex in the past 12 months? [Prompt: please consider all types of partners, including spouse(s), cohabitating partner(s), girlfriend(s),Sweetheart (s), one-night lover(s), casual partners, sex worker(s), etc.]

Last sexual intercourse

Country / Survey / Year / Qnum M,F / Wording
Kenya / DHS / 2008 / 421, 627 / When was the last time you had sexual intercourse with this person? (D/W/M)
PSI / 2011 / 217 / Between January 2008 and now, when was the Last time you had sex with her/him (Wk/Date opt, M/Y)
Lesotho / DHS / 2009 / 421, 627 / When was the last time you had sexual intercourse with this person? (D/W/M)
PSI / 2008 / 506 / When did you last have sex with this partner? (M/Y)
Uganda / DHS / 2006 / 421, 627 / When was the last time you had sexual intercourse with this person? (D/W/M)
PSI / 2008 / 400C / When did you last have sex with this partner? (M/Y)
Zambia / DHS / 2007 / 422, 627 / When was the last time you had sexual intercourse with this person? (D/W/M)
PSI / 2009 / CP104 / When did you last have sex with this partner? (M/Y)

First sexual intercourse

Country / Survey / Year / Qnum F,M / Wording
Kenya / DHS / 2008 / 425, 631 / For how long (have you had/did you have) a sexual relationship with this person? (D/M/Y)
PSI / 2011 / 216 / Between January 2008 and now, when was the first time you had sex with her/him? (Wk/Date opt, M/Y)
Lesotho / DHS / 2009 / 425, 631 / How long ago did you first have sexual intercourse with (this/second/third) person? (D/M/Y)
PSI / 2008 / 505 / When did you first have sex with this partner? (M/Y)
Uganda / DHS / 2006 / 425, 631 / For how long (have you had/did you have) a sexual relationship with this person? (D/M/Y)
PSI / 2008 / 400B / When did you first have sex with this partner? (M/Y)
Zambia / DHS / 2007 / 631, 426 / For how long (have you had/did you have) a sexual relationship with this person? (D/M/Y)
PSI / 2009 / CP103 / When did you first have sex with this partner? (M/Y)

A2. Indicator prevalence estimates from all surveys

Multiple partners in the last year

Original / Kenya / Lesotho / Uganda / Zambia
Men / DHS / 11.1% / 27.4% / 30.2% / 17.2%
PSI / 17.2% / 40.3% / 34.9% / 39.7%
Women / DHS / 1.4% / 7.5% / 1.0% / 1.4%
PSI / 4.7% / 14.7% / 10.1% / 9.2%
Composition Adjusted
Men / DHS / 11.1% / 27.4% / 30.2% / 17.2%
PSI / 16.5% / 38.6% / 35.3% / 39.0%
Women / DHS / 1.4% / 7.5% / 1.0% / 1.4%
PSI / 4.3% / 14.0% / 9.6% / 8.9%

Cumulative concurrency prevalence

Original / Kenya / Lesotho / Uganda / Zambia
Men / DHS / 6.0% / 18.3% / 9.7% / 8.2%
PSI / 15.3% / 32.3% / 23.0% / 35.4%
Women / DHS / 0.8% / 5.6% / 0.5% / 0.8%
PSI / 2.6% / 11.1% / 4.2% / 7.6%
Composition Adjusted
Men / DHS / 6.0% / 18.3% / 9.7% / 8.2%
PSI / 14.7% / 31.0% / 23.1% / 34.7%
Women / DHS / 0.8% / 5.6% / 0.5% / 0.8%
PSI / 2.9% / 9.4% / 4.0% / 7.4%
Multiple partnered only
Men / DHS / 53.9% / 66.7% / 32.2% / 47.8%
PSI / 89.3% / 80.3% / 65.5% / 88.9%
Women / DHS / 53.2% / 74.6% / 50.6% / 57.2%
PSI / 69.0% / 66.4% / 41.7% / 83.6%

Point Concurrency Prevalence

Original / Kenya / Lesotho / Uganda / Zambia
Men / DHS / 1.9% / 9.7% / 3.8% / 3.3%
PSI / 11.5% / 21.0% / 18.4% / 20.8%
Women / DHS / 0.4% / 2.8% / 0.3% / 0.3%
PSI / 1.2% / 6.8% / 3.0% / 4.7%
Composition adjusted
Men / DHS / 1.9% / 9.7% / 3.8% / 3.3%
PSI / 10.9% / 20.4% / 18.7% / 20.5%
Women / DHS / 0.4% / 2.8% / 0.3% / 0.3%
PSI / 1.6% / 5.8% / 2.9% / 4.6%
Multiple partnered only
Men / DHS / 17.4% / 35.5% / 12.5% / 19.3%
PSI / 65.9% / 52.6% / 52.8% / 52.5%
Women / DHS / 30.7% / 37.4% / 35.7% / 20.4%
PSI / 36.8% / 40.2% / 30.1% / 51.4%

A3. Missing data sources and rates

Country
Point
Concurrency / Sex / Study / Source / Kenya / Lesotho / Uganda / Zambia
Men / DHS / multp / 0.3% / 0.4% / 0.2% / 0.3%
dates / 7.4% / 7.6% / 24.6% / 8.6%
PSI / multp / 0.4% / 0.0% / 0.1% / 0.0%
dates / 7.6% / 20.0% / 18.9% / 5.3%
Women / DHS / multp / 0.3% / 0.4% / 0.2% / 0.1%
dates / 0.5% / 3.1% / 0.8% / 0.5%
PSI / multp / 0.4% / 0.0% / 1.7% / 0.1%
dates / 3.1% / 10.8% / 7.4% / 3.6%
Country
Cumulative
Concurrency / Sex / Study / Source / Kenya / Lesotho / Uganda / Zambia
Men / DHS / multp / 0.3% / 0.4% / 0.2% / 0.3%
dates / 7.4% / 11.4% / 24.6% / 9.8%
PSI / multp / 0.4% / 0.0% / 0.1% / 0.0%
dates / 11.4% / 8.7% / 14.3% / 4.2%
Women / DHS / multp / 0.3% / 0.4% / 0.2% / 0.1%
dates / 0.7% / 2.9% / 0.7% / 0.7%
PSI / multp / 0.4% / 0.0% / 1.7% / 0.1%
dates / 2.9% / 6.5% / 6.2% / 3.6%