Table 4.
Regression models to examine the potential differences in odds for detection of Cs-137 and Cs-134 before April 2013 between those who participated in the WBC monitoring and those who did not after April.
| Variables | Cs-137 before April 2013 | Cs-134 before April 2013 |
|---|---|---|
| Whole body counter (WBC) monitoring participation after April 2013 | ||
| No | 1.02 (0.92–1.13) | 1.11 (1.00–1.23) |
| Yes | 1.00 | 1.00 |
| Age group (year) | ||
| 21–30 | 0.59 (0.48–0.72) *** | 0.60 (0.49–0.74) *** |
| 31–40 | 0.69 (0.59–0.81) *** | 0.66 (0.56–0.78) *** |
| 41–50 | 0.78 (0.66–0.91) ** | 0.75 (0.63–0.88) ** |
| 51–60 | 0.84 (0.73–0.97) * | 0.88 (0.76–1.01) |
| 61–70 | 1.00 | 1.00 |
| 71–80 | 1.25 (1.07–1.45) ** | 1.20 (1.02–1.40) * |
| 81– | 1.53 (1.19–1.97) ** | 1.18 (0.90–1.54) |
| Sex | ||
| Men | 1.00 | 1.00 |
| Women | 0.27 (0.24–0.31) *** | 0.31 (0.27–0.35) *** |
| Height at WBC measurement | 1.00 (0.99–1.01) | 1.00 (0.99–1.01) |
| Weight at WBC measurement | 1.02 (1.02–1.02) *** | 1.02 (1.01–1.02) *** |
| Post-incident actual lived-at address | ||
| Inside Minamisoma City | 1.00 | 1.00 |
| Outside Minamisoma City but inside Fukushima Prefecture | 1.07 (0.93–1.24) | 1.14 (0.99–1.32) |
| Neighboring prefectures of Fukushima | 0.61 (0.50–0.74) *** | 0.57 (0.46–0.70) *** |
| Outside the neighboring prefectures | 0.31 (0.22–0.45) *** | 0.30 (0.20–0.43) *** |
| Air dose rate (μSv/h) as of 29 April 2011 at pre-incident residential address | 1.25 (1.17–1.34) *** | 1.27 (1.21–1.34) *** |
Note: * p < 0.05; ** p < 0.01; *** p < 0.001. Variables in the tables were mutually adjusted. Pre-incident residential address was also adjusted as a random effect. NA indicates no detected individuals.