Table 2.
Comparison between population means of modeled estimates of probability of Cs detection and actual detection rate in whole body counter (WBC) monitoring participants, for both sexes combined (A), men (B), and women (C), for Cs-137 (the upper) and Cs-134 (the lower).
| (A) Both Sexes Combined | ||||
|---|---|---|---|---|
| Cs-137 | ||||
| WBC Participants | Whole Population | |||
| Time Period | Actual Detection Rate (%) | Population Mean of Modeled probability of detection (%) (95% CI) * | Difference (%) (95% CI) ** | p-Value |
| October 2011 | 65.1 | 66.9 (66.7 to 67.0) | −1.8 (−4.6 to 0.9) | 0.19 |
| November 2011 | 37.7 | 36.5 (36.4 to 36.7) | 1.2 (−1.2 to 3.6) | 0.33 |
| December 2011 | 29.9 | 33.6 (33.5 to 33.8) | −3.7 (−6.1 to −1.4) | <0.01 |
| January 2012 | 27.8 | 30.1 (29.9 to 30.2) | −2.2 (−5.1 to 0.7) | 0.14 |
| February 2012 | 25.8 | 21.1 (21.0 to 21.3) | 4.6 (1.7 to 7.6) | <0.01 |
| March 2012 to April 2012 | 13.2 | 14.9 (14.7 to 15.0) | −1.6 (−3.5 to 0.3) | 0.12 |
| May 2012 | 11.6 | 10.8 (10.7 to 10.9) | 0.8 (−0.9 to 2.6) | 0.34 |
| June 2012 | 7.5 | 8.5 (8.5 to 8.6) | −1.0 (−2.4 to 0.3) | 0.16 |
| July 2012 to August 2012 | 6.2 | 5.9 (5.9 to 6.0) | 0.2 (−0.6 to 1.1) | 0.60 |
| September 2012 to March 2013 | 5.4 | 5.3 (5.2 to 5.3) | 0.1 (−0.7 to 0.9) | 0.78 |
| April 2013 to March 2015 | 1.6 | 1.4 (1.4 to 1.4) | 0.2 (0.0 to 0.5) | 0.05 |
| Cs-134 | ||||
| WBC Participants | Whole Population | |||
| Time Period | Actual Detection Rate (%) | Population Mean of Modeled Probability of Detection (%) (95% CI) * | Difference (%) (95% CI) ** | p-Value |
| October 2011 | 60.0 | 52.9 (52.7 to 53.1) | 7.1 (4.3 to 9.9) | <0.001 |
| November 2011 | 35.4 | 34.7 (34.5 to 34.9) | 0.7 (−1.7 to 3.1) | 0.57 |
| December 2011 | 34.2 | 37.0 (36.9 to 37.2) | −2.8 (−5.3 to −0.4) | <0.05 |
| January 2012 | 23.5 | 24.9 (24.7 to 25.0) | −1.3 (−4.1 to 1.4) | 0.34 |
| February 2012 | 18.5 | 16.2 (16.1 to 16.4) | 2.2 (−0.4 to 4.8) | 0.08 |
| March 2012 to April 2012 | 9.9 | 11.2 (11.1 to 11.3) | −1.3 (−3.0 to 0.4) | 0.15 |
| May 2012 | 7.0 | 6.0 (5.9 to 6.0) | 1.0 (−0.4 to 2.4) | 0.13 |
| June 2012 | 4.6 | 4.8 (4.8 to 4.9) | −0.2 (−1.3 to 0.9) | 0.73 |
| July 2012 to August 2012 | 4.4 | 4.5 (4.5 to 4.6) | −0.1 (−0.9 to 0.6) | 0.75 |
| September 2012 to March 2013 | 3.2 | 3.1 (3.1 to 3.1) | 0.1 (−0.5 to 0.8) | 0.69 |
| April 2013 to March 2015 | 0.6 | 0.6 (0.6 to 0.6) | 0.0 (−0.1 to 0.2) | 0.62 |
| (B) Men | ||||
| Cs-137 | ||||
| WBC Participants | Whole Population | |||
| Time Period | Actual Detection Rate (%) | Population Mean of Modeled Probability of Detection (%) (95% CI) * | Difference (%) (95% CI) ** | p-Value |
| October 2011 | 86.4 | 86.0 (85.9 to 86.1) | 0.4 (−2.6 to 3.4) | 0.79 |
| November 2011 | 58.7 | 54.4 (54.2 to 54.6) | 4.3 (0.5 to 8.0) | <0.05 |
| December 2011 | 50.2 | 50.9 (50.7 to 51.1) | −0.6 (−4.6 to 3.3) | 0.75 |
| January 2012 | 49.0 | 49.9 (49.8 to 50.1) | −0.9 (−5.9 to 4.0) | 0.71 |
| February 2012 | 44.1 | 36.8 (36.7 to 37.0) | 7.3 (2.4 to 12.1) | <0.01 |
| March 2012 to April 2012 | 25.2 | 24.8 (24.7 to 25.0) | 0.4 (−3.5 to 4.2) | 0.85 |
| May 2012 | 22.4 | 19.1 (19.0 to 19.2) | 3.3 (−0.2 to 6.7) | 0.05 |
| June 2012 | 16.8 | 15.8 (15.6 to 15.9) | 1.0 (−2.1 to 4.1) | 0.51 |
| July 2012 to August 2012 | 12.1 | 10.7 (10.6 to 10.8) | 1.4 (−0.4 to 3.3) | 0.10 |
| September 2012 to March 2013 | 9.0 | 8.4 (8.3 to 8.5) | 0.6 (−0.9 to 2.1) | 0.41 |
| April 2013 to March 2015 | 2.7 | 2.1 (2.0 to 2.1) | 0.6 (0.1 to 1.2) | <0.01 |
| Cs-134 | ||||
| WBC Participants | Whole population | |||
| Time Period | Actual Detection Rate (%) | Population Mean of Modeled Probability of Detection (%) (95% CI) * | Difference (%) (95% CI) ** | p-Value |
| October 2011 | 83.4 | 76.8 (76.7 to 76.9) | 6.5 (3.3 to 9.8) | <0.001 |
| November 2011 | 55.9 | 52.6 (52.5 to 52.8) | 3.2 (−0.5 to 7.0) | 0.10 |
| December 2011 | 54.9 | 54.7 (54.5 to 54.9) | 0.2 (−3.8 to 4.1) | 0.94 |
| January 2012 | 42.3 | 42.3 (42.1 to 42.5) | −0.1 (−4.9 to 4.8) | 0.98 |
| February 2012 | 33.3 | 29.7 (29.5 to 29.8) | 3.6 (−1.0 to 8.1) | 0.12 |
| March 2012 to April 2012 | 19.9 | 19.5 (19.4 to 19.6) | 0.4 (−3.1 to 4.0) | 0.81 |
| May 2012 | 13.2 | 10.5 (10.4 to 10.6) | 2.8 (−0.1 to 5.6) | <0.05 |
| June 2012 | 10.4 | 9.0 (8.9 to 9.0) | 1.4 (−1.1 to 3.9) | 0.24 |
| July 2012 to August 2012 | 7.6 | 7.2 (7.1 to 7.2) | 0.4 (−1.0 to 1.9) | 0.55 |
| September 2012 to March 2013 | 4.4 | 4.0 (3.9 to 4.0) | 0.4 (−0.7 to 1.5) | 0.44 |
| April 2013 to March 2015 | 1.0 | 0.9 (0.9 to 0.9) | 0.2 (−0.1 to 0.5) | 0.23 |
| (C) Women | ||||
| Cs-137 | ||||
| WBC Participants | Whole Population | |||
| Time Period | Actual Detection Rate (%) | Population Mean of Modeled Probability of Detection (%) (95% CI) * | Difference (%) (95% CI) ** | p-Value |
| October 2011 | 47.8 | 49.3 (49.1 to 49.4) | −1.5 (−5.4 to 2.4) | 0.45 |
| November 2011 | 22.0 | 20.1 (20.0 to 20.2) | 1.8 (−0.9 to 4.6) | 0.18 |
| December 2011 | 15.5 | 17.7 (17.6 to 17.8) | −2.2 (−4.6 to 0.2) | 0.09 |
| January 2012 | 12.5 | 11.8 (11.7 to 11.9) | 0.7 (−2.0 to 3.5) | 0.59 |
| February 2012 | 8.9 | 6.7 (6.6 to 6.7) | 2.2 (−0.4 to 4.8) | 0.06 |
| March 2012 to April 2012 | 5.4 | 5.7 (5.6 to 5.7) | −0.3 (−1.9 to 1.3) | 0.72 |
| May 2012 | 4.1 | 3.2 (3.2 to 3.2) | 0.8 (−0.6 to 2.2) | 0.19 |
| June 2012 | 1.6 | 1.9 (1.9 to 1.9) | −0.2 (−1.1 to 0.6) | 0.59 |
| July 2012 to August 2012 | 1.6 | 1.6 (1.6 to 1.6) | 0.0 (−0.6 to 0.6) | 0.91 |
| September 2012 to March 2013 | 2.2 | 2.4 (2.4 to 2.4) | −0.2 (−0.9 to 0.5) | 0.64 |
| April 2013 to March 2015 | 0.8 | 0.7 (0.7 to 0.7) | 0.1 (−0.2 to 0.3) | 0.58 |
| Cs-134 | ||||
| WBC Participants | Whole Population | |||
| Time period | Actual Detection Rate (%) | Population Mean of Modeled Probability of Detection (%) (95% CI) * | Difference (%) (95% CI) ** | p-Value |
| October 2011 | 41.0 | 30.9 (30.8 to 31.0) | 10.1 (6.3 to 13.9) | <0.001 |
| November 2011 | 20.0 | 18.2 (18.1 to 18.3) | 1.8 (−0.9 to 4.4) | 0.18 |
| December 2011 | 19.6 | 20.8 (20.7 to 20.9) | −1.2 (−3.8 to 1.5) | 0.39 |
| January 2012 | 10.0 | 8.8 (8.8 to 8.9) | 1.1 (−1.4 to 3.6) | 0.36 |
| February 2012 | 4.9 | 3.9 (3.8 to 3.9) | 1.0 (−1.0 to 3.0) | 0.27 |
| March 2012 to April 2012 | 3.4 | 3.6 (3.6 to 3.7) | −0.3 (−1.6 to 1.0) | 0.68 |
| May 2012 | 2.5 | 1.9 (1.9 to 1.9) | 0.7 (−0.4 to 1.8) | 0.18 |
| June 2012 | 1.0 | 1.0 (1.0 to 1.0) | 0.0 (−0.7 to 0.6) | 0.97 |
| July 2012 to August 2012 | 2.0 | 2.1 (2.1 to 2.1) | −0.1 (−0.8 to 0.5) | 0.70 |
| September 2012 to March 2013 | 2.2 | 2.3 (2.3 to 2.3) | −0.1 (−0.8 to 0.6) | 0.83 |
| April 2013 to March 2015 | 0.3 | 0.3 (0.3 to 0.3) | 0.0 (−0.2 to 0.1) | 0.87 |
Note: CI = confidence interval; * confidence intervals for the population mean of modeled probability; ** confidence intervals for the difference between the population mean of modeled probability and actual detection rate.