In 2009 in the US, Crowley et al., in a study of 13,821 US patients with intracerebral haemorrhage (ICH), reported the risk of in-hospital death was 12% higher with weekend admission (OR = 1.12; 95% CI 1.05-1.20). In China, in 2012, Jiang et al., in a much smaller study (of 313 patients with ICH) found that weekend admission was not a statistically significant predictive factor of in-hospital mortality (p=0.315) or functional outcome (p=0.128). However, in 2016, Patel et al., also in the US, studied 485,329 patients with intracerebral haemorrhage (ICH). Overall, weekend admission was associated with 11% higher odds of in-hospital mortality. When analysed in 3-year groups, excess mortality of weekend admissions showed temporal decline. Three relatively small studies on SAH have been carried out. Crowley et al., in the US in 2009, investigated patients with subarachnoid haemorrhage (SAH; 5667 patients). Unlike the group's other study, weekend admission was not a statistically significant independent predictor of death in the study population at 7 days (OR = 1.07, 95% CI 0.91-1.25), 14 days (OR = 1.01, 95% CI 0.87-1.17), or 30 days (OR = 1.03, 95% CI 0.89-1.19). In 2011, in China, Zhang et al., in a smaller study, analysed 183 patients with SAH. In logistic regression model, weekend admission was not an independent predictor of higher in-hospital mortality (OR = 1.77, 95% CI 0.83-3.77) after SAH. However a weekend effect was observed by Deshmukh et al., in 2016, when the group studied 385 UK patients with SAH. They found that the patients admitted on a weekend had a significantly higher scan to treatment time (83.1 ± 83.4 h vs 40.4 ± 53.4 h, p<0.0001) and admission to treatment (71.6 ± 79.8 h vs 27.5 ± 44.3 h, p  investigated 14,093 US patients with acute non-traumatic subdural haemorrhage. In multivariate analysis, weekend admission (OR = 1.19; 95% CI 1.02-1.38) was an independent predictor of in-hospital mortality.