Adverse associations for ever siesta were somewhat stronger for triple-negative breast cancer (estrogen receptor (ER)-, progesterone receptor (PR)- and luminal human epidermal growth factor receptor (HER) 2-) (relative risk ratio (RRR) = 1.69, 95% CI 1.15–2.49) (p value heterogeneity = 0.28) (Table 3). The gene discussed is PGR; the disease is triple-negative breast carcinoma.