National tables: studies, age and sex. Percentages Persons 18 to 49 years by sex HIV/AIDS prevention methods, opinion on efficiency, age group and studies. Units: percentages Total From 18 to 29 years of age From 30 to 39 years of age From 40 to 49 years of age Total Lower than secondary education Secondary education University Total Lower than secondary education Secondary education University Total Lower than secondary education Secondary education University Total Lower than secondary education Secondary education University Both sexes Wash after having sexual relations Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Effective 21.45 31.31 17.82 9.36 21.89 33.16 18.66 10.01 19.25 28.15 16.68 8.00 23.49 32.75 17.75 10.40 Not effective 78.55 68.69 82.18 90.64 78.11 66.84 81.34 89.99 80.75 71.85 83.32 92.00 76.51 67.25 82.25 89.60 Choose partners correctly Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Effective 64.75 67.58 63.59 61.51 63.57 67.00 62.70 59.73 62.65 65.94 60.43 60.42 68.77 69.75 69.65 65.21 Not effective 35.25 32.42 36.41 38.49 36.43 33.00 37.30 40.27 37.35 34.06 39.57 39.58 31.23 30.25 30.35 34.79 Have few partners Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Effective 45.10 51.00 41.32 40.82 41.22 47.04 38.79 36.92 43.83 49.49 40.43 39.35 51.73 56.16 47.53 47.66 Not effective 54.90 49.00 58.68 59.18 58.78 52.96 61.21 63.08 56.17 50.51 59.57 60.65 48.27 43.84 52.47 52.34 Use a male condom Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Effective 96.74 95.17 97.62 98.17 96.05 93.42 97.09 98.17 97.02 95.42 98.17 98.05 97.31 96.50 97.91 98.34 Not effective 3.26 4.83 2.38 1.83 3.95 6.58 2.91 1.83 2.98 4.58 1.83 1.95 2.69 3.50 2.09 1.66 Use spermicides Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Effective 18.36 23.17 17.22 12.20 21.65 27.21 20.87 14.50 15.68 20.68 13.36 11.39 17.19 21.82 15.37 10.49 Not effective 81.64 76.83 82.78 87.80 78.35 72.79 79.13 85.50 84.32 79.32 86.64 88.61 82.81 78.18 84.63 89.51 Ask partner to have an AIDS test Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Effective 70.34 69.17 71.81 69.89 73.89 71.78 74.99 74.92 67.91 67.15 68.19 68.77 68.49 68.76 70.36 65.17 Not effective 29.66 30.83 28.19 30.11 26.11 28.22 25.01 25.08 32.09 32.85 31.81 31.23 31.51 31.24 29.64 34.83 Have an AIDS test frequently Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Effective 61.60 68.85 61.59 48.11 66.33 73.03 66.65 54.02 57.23 66.46 54.78 45.25 60.54 67.35 60.76 44.68 Not effective 38.40 31.15 38.41 51.89 33.67 26.97 33.35 45.98 42.77 33.54 45.22 54.75 39.46 32.65 39.24 55.32 Ask partners about their sexual history Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Effective 42.63 48.78 41.36 33.51 49.11 54.68 47.75 42.76 38.38 46.16 35.83 29.19 39.14 45.91 36.23 28.01 Not effective 57.37 51.22 58.64 66.49 50.89 45.32 52.25 57.24 61.62 53.84 64.17 70.81 60.86 54.09 63.77 71.99 Use a female condom Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Effective 54.97 58.57 54.53 49.19 60.37 62.98 61.12 54.15 51.35 55.76 49.81 46.44 52.04 57.15 48.01 46.80 Not effective 45.03 41.43 45.47 50.81 39.63 37.02 38.88 45.85 48.65 44.24 50.19 53.56 47.96 42.85 51.99 53.20 Males Wash after having sexual relations Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Effective 23.31 33.52 18.87 9.63 22.39 32.54 18.14 9.65 21.57 31.13 18.58 7.38 26.59 37.21 20.60 12.33 Not effective 76.69 66.48 81.13 90.37 77.61 67.46 81.86 90.35 78.43 68.87 81.42 92.62 73.41 62.79 79.40 87.67 Choose partners correctly Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Effective 68.63 70.58 68.23 65.12 68.65 70.69 67.90 65.84 65.02 68.97 63.25 60.03 72.93 72.24 75.46 70.47 Not effective 31.37 29.42 31.77 34.88 31.35 29.31 32.10 34.16 34.98 31.03 36.75 39.97 27.07 27.76 24.54 29.53 Have few partners Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Effective 46.54 51.41 43.04 42.92 42.12 46.10 39.65 39.55 45.35 52.27 41.75 37.52 53.82 56.37 50.98 52.68 Not effective 53.46 48.59 56.96 57.08 57.88 53.90 60.35 60.45 54.65 47.73 58.25 62.48 46.18 43.63 49.02 47.32 Use a male condom Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Effective 97.33 96.07 98.49 97.74 96.47 94.04 98.12 97.62 97.59 96.53 98.76 97.72 98.14 97.76 98.82 97.88 Not effective 2.67 3.93 1.51 2.26 3.53 5.96 1.88 2.38 2.41 3.47 1.24 2.28 1.86 2.24 1.18 2.12 Use spermicides Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Effective 19.47 23.74 18.48 13.04 23.17 27.16 22.38 16.14 16.89 21.52 14.38 12.94 17.54 22.11 16.74 10.16 Not effective 80.53 76.26 81.52 86.96 76.83 72.84 77.62 83.86 83.11 78.48 85.62 87.06 82.46 77.89 83.26 89.84 Ask partner to have an AIDS test Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Effective 68.40 67.72 70.44 65.72 72.09 71.67 73.56 68.80 65.55 65.24 66.46 64.59 66.83 65.97 69.81 63.98 Not effective 31.60 32.28 29.56 34.28 27.91 28.33 26.44 31.20 34.45 34.76 33.54 35.41 33.17 34.03 30.19 36.02 Have an AIDS test frequently Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Effective 62.07 68.73 61.85 47.62 66.70 73.16 66.77 50.70 57.93 66.26 55.27 45.26 60.87 66.61 61.33 47.36 Not effective 37.93 31.27 38.15 52.38 33.30 26.84 33.23 49.30 42.07 33.74 44.73 54.74 39.13 33.39 38.67 52.64 Ask partners about their sexual history Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Effective 40.57 47.01 38.91 29.81 48.03 54.12 44.72 42.90 35.21 41.99 34.83 22.16 37.03 44.67 33.44 26.10 Not effective 59.43 52.99 61.09 70.19 51.97 45.88 55.28 57.10 64.79 58.01 65.17 77.84 62.97 55.33 66.56 73.90 Use a female condom Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Effective 54.63 57.49 54.18 49.30 60.49 61.54 61.43 55.03 50.33 53.36 49.37 45.94 51.81 57.42 47.08 47.58 Not effective 45.37 42.51 45.82 50.70 39.51 38.46 38.57 44.97 49.67 46.64 50.63 54.06 48.19 42.58 52.92 52.42 Females Wash after having sexual relations Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Effective 19.53 28.82 16.68 9.13 21.36 34.01 19.19 10.25 16.83 24.76 14.56 8.49 20.37 28.63 14.43 8.47 Not effective 80.47 71.18 83.32 90.87 78.64 65.99 80.81 89.75 83.17 75.24 85.44 91.51 79.63 71.37 85.57 91.53 Choose partners correctly Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Effective 60.71 64.16 58.51 58.62 58.19 61.82 57.30 55.61 60.20 62.43 57.28 60.72 64.52 67.42 62.80 59.86 Not effective 39.29 35.84 41.49 41.38 41.81 38.18 42.70 44.39 39.80 37.57 42.72 39.28 35.48 32.58 37.20 40.14 Have few partners Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Effective 43.61 50.54 39.43 39.15 40.26 48.36 37.90 35.16 42.26 46.30 38.97 40.77 49.57 55.96 43.37 42.59 Not effective 56.39 49.46 60.57 60.85 59.74 51.64 62.10 64.84 57.74 53.70 61.03 59.23 50.43 44.04 56.63 57.41 Use a male condom Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Effective 96.14 94.17 96.68 98.52 95.61 92.56 96.02 98.54 96.43 94.15 97.53 98.30 96.49 95.35 96.86 98.80 Not effective 3.86 5.83 3.32 1.48 4.39 7.44 3.98 1.46 3.57 5.85 2.47 1.70 3.51 4.65 3.14 1.20 Use spermicides Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Effective 17.23 22.54 15.86 11.52 20.06 27.27 19.32 13.40 14.49 19.79 12.27 10.17 16.85 21.56 13.78 10.83 Not effective 82.77 77.46 84.14 88.48 79.94 72.73 80.68 86.60 85.51 80.21 87.73 89.83 83.15 78.44 86.22 89.17 Ask partner to have an AIDS test Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Effective 72.32 70.80 73.29 73.21 75.78 71.94 76.47 79.09 70.34 69.36 70.09 72.00 70.14 71.25 71.01 66.37 Not effective 27.68 29.20 26.71 26.79 24.22 28.06 23.53 20.91 29.66 30.64 29.91 28.00 29.86 28.75 28.99 33.63 Have an AIDS test frequently Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Effective 61.10 68.98 61.30 48.49 65.93 72.86 66.52 56.28 56.51 66.70 54.22 45.24 60.20 68.05 60.07 41.97 Not effective 38.90 31.02 38.70 51.51 34.07 27.14 33.48 43.72 43.49 33.30 45.78 54.76 39.80 31.95 39.93 58.03 Ask partners about their sexual history Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Effective 44.75 50.78 44.02 36.45 50.23 55.44 50.90 42.66 41.65 50.97 36.91 34.71 41.27 47.06 39.55 29.92 Not effective 55.25 49.22 55.98 63.55 49.77 44.56 49.10 57.34 58.35 49.03 63.09 65.29 58.73 52.94 60.45 70.08 Use a female condom Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Effective 55.31 59.79 54.92 49.11 60.25 64.98 60.79 53.56 52.40 58.50 50.28 46.82 52.27 56.90 49.12 46.01 Not effective 44.69 40.21 45.08 50.89 39.75 35.02 39.21 46.44 47.60 41.50 49.72 53.18 47.73 43.10 50.88 53.99 Notes: Data corresponding to cells with less than 45,000 persons must be used with caution, because they may be affected by high sample errors. Source: National Statistics Institute