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Table 3 Proportions and crude and age-adjusted risk ratios of patient delay post- versus pre-disaster (95% CI)

From: Breast cancer patient delay in Fukushima, Japan following the 2011 triple disaster: a long-term retrospective study

Characteristics Proportion (%) Crude risk ratio Age-adjusted risk ratio
Total delay (≥3 months)
 Pre-disaster 18.0% (22/122) Ref. Ref.
 Post-disaster
  Overall population 29.9% (29/97) 1.66 (1.02–2.69)* 1.66 (1.02–2.70)*
  2011–2012a 20.0% (2/10) 1.11 (0.30–4.05) 1.11 (0.30–4.04)
  2012–2013a 27.3% (6/22) 1.51 (0.69–3.30) 1.51 (0.69–3.30)
  2013–2014a 26.7% (4/15) 1.48 (0.59–3.71) 1.49 (0.59–3.74)
  2014–2015a 37.0% (10/27) 2.05 (1.10–3.82)* 2.05 (1.10–3.81)*
  2015–2016a 30.4% (7/23) 1.69 (0.82–3.48) 1.75 (0.84–3.63)
Excessive delay (≥12 months)
 Pre-disaster 4.1% (5/122) Ref. Ref.
 Post-disaster
  Overall population 18.6% (18/97) 4.53 (1.74–11.76)** 4.49 (1.73–11.65)**
  2011–2012a 10.0% (1/10) 2.44 (0.31–18.91) 2.44 (0.31–18.85)
  2012–2013a 22.7% (5/22) 5.55 (1.75–17.57)** 5.58 (1.77–17.56)**
  2013–2014a 6.7% (1/15) 1.63 (0.20–13.01) 1.63 (0.20–12.94)
  2014–2015a 22.2% (6/27) 5.42 (1.78–16.47)** 5.27 (1.73–16.03)**
  2015–2016a 21.7% (5/23) 5.30 (1.67–16.87)** 5.24 (1.64–16.78)**
  1. aIn each period, the starting date is 11 March
  2. *<0.05, **<0.01