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Table 2 Daily average specimen numbers for EID testing as well as cost savings at varying pool sizes, per annum, Division of Medical Virology, National Health Laboratory Service Tygerberg and Stellenbosch University

From: Pooled PCR testing of dried blood spots for infant HIV diagnosis is cost efficient and accurate

Year Mean (SD) daily number of samples Positivity rate (%) % Cost saved (95% CI) % Batched runs saved (95% CI)
Pool size = 2 Pool size = 5 Pool size = 2 Pool size = 5
2009 39 (26) 10.0 32 (31.7–32.3) 41 (40.1–42) 32 (31.2–32.8) 29.3 (27.7–31)
2010 35 (17) 9.0 34 (33.7–34.3) 44.3 (43.3–45.2) 31.1 (30.3–31.9) 28.8 (27–30.6)
2011 36 (18) 6.8 39.6 (39.4–39.8) 52.8 (52–53.5) 31.1 (30.4–32) 32.2 (30.7–33.8)
2012 40 (17) 5.1 43.1 (43–43.3) 59.7 (59.2–60.3) 37.2 (36.6–37.9) 40.4 (39.2–41.5)
2013 48 (21) 3.6 44.2 (44.1–44.4) 64.3 (63.9–64.7) 40 (39.5–40.4) 51.2 (50.4–52.1)
2014 55 (19) 4.3 42.6 (42.5–42.7) 61 (60.6–61.5) 39.8 (39.3–40.3) 50.9 (49.8–51.9)
2015 67 (26) 3.6 43.3 (43.3–43.5) 63.5 (63.1–64) 40.8 (40.4–41.3) 54.5 (53.3–55.7)
Overall 45 (23) 5.7  
  1. SD Standard deviation, CI Confidence interval