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Table 2 Risk factors of the population older than 11 years of age in the municipalities studied

From: Human T-lymphotropic virus 1aA circulation and risk factors for sexually transmitted infections in an Amazon geographic area with lowest human development index (Marajó Island, Northern Brazil)

Risk factors SSBV Anajás Portel Chaves Total
n (%) n (%) n (%) n (%) n (%)
Do you know what STDs are?
 No 127 (58.80) 142 (67.62) 287 (57.06) 146 (56.15) 702 (59.04)
 Yes 89 (41.20) 68 (32.38) 216 (42.94) 114 (43.85) 487 (40.96)
 NR* 60   64   93   44   261  
Do you use condoms?
 Always 43 (20.00) 53 (25.73) 112 (23.58) 59 (24.08) 267 (23.40)
 Never 106 (49.30) 94 (45.63) 204 (42.95) 93 (37.96) 497 (43.56)
 Sometimes 66 (30.70) 59 (28.64) 159 (33.47) 93 (37.96) 377 (33.04)
 NR* 61   68   121   59   309  
Do you have a steady partner?
 Yes 162 (75.00) 162 (76.42) 367 (77.59) 186 (75.92) 877 (76.53)
 No 54 (25.00) 50 (23.58) 106 (22.41) 59 (24.08) 269 (23.47)
 NR* 60   62   123   59   304  
Sexual orientation
 Homosexual 3 (1.33) 18 (8.87) 23 (4.80) 5 (2.03) 49 (4.25)
 Heterosexual 221 (98.22) 184 (90.64) 452 (94.36) 240 (97.56) 1097 (95.14)
 Bisexual 1 (0.44) 1 (0.49) 4 (0.84) 1 (0.41) 7 (0.61)
 NR* 51   71   117   58   297  
Do you use illicit drugs?
 Yes 6 (3.24) 15 (6.79) 17 (3.70) 5 (1.91) 43 (3.81)
 No 179 (96.76) 206 (93.21) 443 (96.30) 257 (98.09) 1085 (96.19)
 NR* 91   53   136   42   322  
Are you sexually active?
 Yes 173 (74.25) 166 (71.86) 391 (73.36) 211 (77.29) 941 (74.09)
 No 60 (25.75) 65 (28.14) 142 (26.64) 62 (22.71) 329 (25.91)
 NR* 43   43   63   31   180  
Age of sexual debut
 10–15 years 68 (31.63) 82 (40.59) 184 (39.48) 98 (41.18) 432 (38.54)
 16–20 years 121 (56.28) 100 (49.50) 249 (53.43) 125 (52.52) 595 (53.08)
 21–25 years 20 (9.30) 17 (8.42) 28 (6.01) 11 (4.62) 76 (6.78)
  > 25 years 6 (2.79) 3 (1.49) 5 (1.07) 4 (1.68) 18 (1.61)
 NR* 61   72   130   66   329  
Sex with sex workers
 Yes 8 (4.08) 20 (9.90) 29 (6.58) 14 (5.88) 71 (6.59)
 No 188 (95.92) 182 (90.10) 412 (93.42) 224 (94.12) 1006 (93.41)
 NR* 80   72   155   66   373  
  1. * NR: not reported