Table 4

Estimated annual number of condoms used

Estimation Method

Kenya 1998

Nigeria 1999

Tanzania 1996

Tanzania 1999

Zimbabwe 1994

Zimbabwe 1999

Frequency of Intercourse

Probability of Condom Use

Males

F₁ Self-Reported

p₁ Self-Reported

-.-

-.-

-.-

-.-

18,047,620

-.-

p₂ Last Intercourse

-.-

-.-

-.-

-.-

19,451,694

-.-

p₃ Previous Day

-.-

-.-

-.-

-.-

11,408,033

-.-

F₂ Previous Day

p₁ Self-Reported

-.-

-.-

-.-

-.-

12,209,655

-.-

p₂ Last Intercourse

10,650,977

5,522,394

14,919,839

19,053,896

11,515,528

10,850,758

p₃ Previous Day

7,734,312

6,779,088

6,231,789

9,805,457

6,275,443

7,660,061

F₃ Survival Analysis

p₁ Self-Reported

-.-

-.-

-.-

-.-

4,136,103

-.-

p₂ Last Intercourse

10,121,645

18,858,423

4,891,365

7,493,313

3,999,271

4,468,660

p₃ Previous Day

7,221,404

10,010,100

2,439,635

3,754,680

2,324,967

3,262,927

Females

F₁ Self-Reported

p₁ Self-Reported

-.-

-.-

-.-

-.-

7,980,256

-.-

p₂ Last Intercourse

-.-

-.-

-.-

-.-

8,406,142

-.-

p₃ Previous Day

-.-

-.-

-.-

-.-

7,088,876

-.-

F₂ Previous Day

p₁ Self-Reported

-.-

-.-

-.-

-.-

6,913,439

-.-

p₂ Last Intercourse

3,375,708

4,632,093

5,529,321

10,744,128

7,253,275

3,700,789

p₃ Previous Day

2,091,845

7,622,258

2,759,809

8,422,675

6,115,040

1,591,401

F₃ Survival Analysis

p₁ Self-Reported

-.-

-.-

-.-

-.-

1,111,439

-.-

p₂ Last Intercourse

2,200,502

4,503,194

993,705

2,756,648

1,137,474

1,395,517

p₃ Previous Day

986,769

5,253,132

444,480

1,994,578

914,083

647,804

Highest Estimate

10,650,977

18,858,423

14,919,839

19,053,896

19,451,694

10,850,758

Lowest Estimate

986,769

4,503,194

444,480

1,994,578

914,083

647,804

Sales, Survey Year

11,797,536

108,444,464

41,629,132

45,024,836

38,316,656

71,432,882

Sales, Previous Year

13,516,931

67,629,732

51,030,840

53,409,352

63,778,992

35,751,329

Meekers and Van Rossem BMC Health Services Research 2005 5:5   doi:10.1186/1472-6963-5-5