NTHL1 and breast cancer: In total, the frequency of NTHL1 p.Q90* in the studied breast cancer cohorts (16/1333, 1.2%, p = 0.61, OR = 0.8, 95% CI = 0.4–1.6, Table 1) did not significantly differ from the population frequency (19/1324, 1.4%) in this geographical region.