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. Author manuscript; available in PMC: 2011 Dec 1.
Published in final edited form as: Transfusion. 2010 Dec;50(12):2628–2637. doi: 10.1111/j.1537-2995.2010.02756.x

Table 3.

Serological Pattern by Demographic Characteristics among 1st time Donors

Characteristics Serological pattern
Confirmed Positive Chagas (CP) Probable Positive Chagas (PP) Possible Other Parasitic Infection (POPI) False Positives (FP)

N (Donations) N (Positive) Prevalence/100,000 donations (95%CI) N (Positive) Prevalence/100,000 donations (95%CI) N (Positive) Prevalence/100,000 donations (95%CI) N (Positive) Prevalence/100,000 donations (95%CI)
Overall 186970 213 114 (99 – 129) 49 26 (19 – 34) 18 10 (5 – 14) 179 96 (82 – 110)
Age
 age <25 73596 11 15 (6 –24)* 6 8 (2 – 15)* 4 5 (0 – 11) 64 87 (66 – 108)
 age ≥ 25 – <35 61857 45 73 (52 –94) 15 24 (12 – 37) 8 13 (4 – 22) 53 86 (63 – 109)
 age ≥ 35 – <45 31329 67 214 (163 – 265) 15 48 (24 – 72) 3 10 (0 – 20) 38 121 (83 – 160)
 age ≥ 45 – <55 15761 57 362 (268 –455) 10 63 (24 – 103) 2 13 (0 – 30) 19 121 (66 – 175)
 age ≥ 55 4363 33 756 (499 – 1013) 3 69 (0 – 147) 1 23 (0 – 68) 5 115 (14 – 215)
Gender
 Female 73630 87 118 (93 – 143) 21 29 (16 – 41) 3 4 (0 – 9)* 56 76 (56 – 96)
 Male 113340 126 111 (92 – 131) 28 25 (16 – 34) 15 13 (7 – 20) 123 109 (89 – 128)
Education
 < High School 12817 60 468 (350 – 586)* 11 86 (35 – 137)* 2 16 (0 – 37) 9 70 (24 – 116)
 High School 16913 39 231 (158– 303) 6 35 (7 – 64) 2 12 (0 – 28) 15 89 (44 – 134)
 Complete 3 of College 62486 29 46 (30 – 63) 6 10 (2 – 17) 2 3 (0 – 8) 33 53 (35 – 71)
 College + 15566 3 19 (0 – 41) -- -- 1 6 (0 – 19) 11 71 (29 – 112)
Type of Donation
 Community 100092 105 105 (85 – 125) 22 22 (13 – 31) 10 10 (4 – 16) 85 85 (67 – 103)
 Replacement 86843 108 124 (101 – 148) 27 31 (19 – 43) 8 9 (3 – 16) 94 108 (86 – 130)
Location
 Recife 57921 27 47 (29 – 64)* 8 14 (4 – 23)* 8 14 (4 – 23) 26 45 (28 – 62)
 Belo Horizonte 43871 45 103 (73 – 133) 7 16 (4 – 28) 5 11 (1 – 21) 87 198 (157 – 240)
 Sao Paulo 85178 141 166 (138 – 193) 34 40 (27 – 53) 5 6 (1 – 11) 66 77 (59 – 96)

95%CI: 95% Confidence Interval

*

p-value < 0.05