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Table 1 Comparisons of the different methods for estimating the daily cumulative dengue cases by absolute relative bias during the 2006-2007 season

From: A dynamic estimation of the daily cumulative cases during infectious disease surveillance: application to dengue fever

    Absolute Relative Bias†
    Gamma Nonparametric Daily-confirmed
Year Date Positive cases Median (IQR) Median (IQR) Median (IQR)
2006 Jun. 1~Jul. 5 3 440.3% (57.8%) 363.6% (50.5%) 100.0% (0%)
  Jul. 6*~Jul. 31 50 5.7% (13.2%) 8.5% (10.9%) 67.7% (19.1%)
  Aug. 1~Aug. 31 108 5.8% (11.2%) 5.3% (8.7%) 30.1% (9.8%)
  Sep. 1~Sep. 30 173 6.9% (2.2%) 4.0% (1.7%) 21.7% (3.0%)
  Oct. 1~Oct. 31 291 6.7% (5.6%) 5.9% (5.8%) 17.3% (2.9%)
  Nov. 1~Nov. 30 230 1.5% (1.2%) 2.3% (1.3%) 11.9% (6.0%)
  Dec. 1~Dec. 31 108 1.7% (1.5%) 3.0% (1.9%) 4.7% (5.3%)
2007 Jan. 1~Jan. 31 13 1.4% (0.6%) 3.9% (0.3%) 0.8% (0.8%)
  Feb. 1~Feb. 28 0 0.9% (0.2%) 3.7% (0.2%) -  
  Mar. 1~Mar. 31 3 0.5% (0.3%) 3.5% (0.4%) 0.1% (0.2%)
  Apr. 1~Apr. 30 0 0.6% (0.3%) 3.9% (0.3%) -  
  1. * The first confirmed positive dengue case appeared on July 6, 2006.
  2. Absolute relative bias (ARB) is calculated by the absolute value of the differences between the estimated and the expected daily cumulative cases divided by the expected daily cumulative cases. See text for details. An ARB closer to zero is a more accurate estimate.