Table 2 Characteristics of the target population for each two-year period from 2009 to 2018.

From: Long-term uptake rate of a breast cancer screening program in Fukushima, Japan, following the 2011 Triple Disaster: a retrospective observational study

Year

2009–2010

2011–2012

2013–2014

2015–2016

2017–2018

Number of target residents

17,110

16,546

16,269

16,049

15,137

Age, median (IQR*)

58 (49–65)

58 (50–65)

59 (49–65)

59 (49–66)

60 (50–67)

Residence, n (%)

 Haramachi ward

11,270 (65.9)

11,025 (66.6)

10,845 (66.7)

10,783 (67.2)

10,384 (68.6)

 Kashima ward

2757 (16.1)

2631 (15.9)

2601 (16.0)

2611 (16.3)

2508 (16.6)

 Odaka ward

3083 (18.0)

2890 (17.5)

2823 (17.4)

2655 (16.5)

2245 (14.8)

Household, n (%)

 Alone

1271 (7.4)

1303 (7.9)

1363 (8.4)

1401 (8.7)

1411 (9.3)

Evacuation status, n (%)

 Evacuation

Not applicable

9157 (55.3)

6380 (39.2)

5879 (36.6)

5115 (33.8)

Uptake of the screening, n (%)

 Participants

3649 (21.3)

1558 (9.4)

2816 (17.3)

3273 (20.4)

3235 (21.4)

  1. *IQR: interquartile range.
  2. The characteristics of the target population were defined over two-year periods. The variables are the statuses in the earlier years in each two-year period.