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. 2021 Oct 4;15:1299. doi: 10.3332/ecancer.2021.1299

Table 1. Breast cancer stages during (September/20–January/21) and prior to (September/19–January/20) the COVID-19 pandemic, according to the AJCC/UICC 8th edition TNM anatomic Staging System.

Period Stage I
N (%)
Stage II
N (%)
Stage III
N (%)
Stage IV
N (%)
p-valuea
September/19–January/20
(N = 457)
94
(29.6%)
198
(43.3%)
106
(23.2%)
59
(12.9%)
<0.001
September/20–January/21
(N = 268)
25
(9.3%)
101
(37.7%)
100
(37.3%)
42
(15.7%)
a

Chi-squared test