Table 1

Performance metrics for COVID-19 hospitalisation by sex and time period

	COVID-19 death		COVID-19 hospitalisation
	Females	Males	Females	Males
1 March 2020–30 April 2020
R²	0.72 (0.71–0.73)	0.69 (0.68–0.70)	0.47 (0.46–0.49)	0.48 (0.46–0.49)
Royston’s D	3.28 (3.20–3.37)	3.06 (2.98–3.15)	1.93 (1.87–2.00)	1.96 (1.90–2.02)
Harrell’s C	0.95 (0.94–0.95)	0.93 (0.92–0.93)	0.81 (0.80–0.82)	0.82 (0.81–0.82)
Brier Score	0.0022 (0.0008–0.0035)	0.0043 (0.0031–0.0056)	0.0011 (0.0009–0.0013)	0.0021 (0.0017–0.0025)
Observed-expected ratio	1.94	1.55	1.13	1.04
1 May 2020–30 June 2020
R²	0.75 (0.74–0.76)	0.75 (0.73–0.76)	0.47 (0.44–0.50)	0.54 (0.51–0.57)
Royston’s D	3.56 (3.44–3.68)	3.50 (3.37–3.63)	1.92 (1.80–2.04)	0.83 (0.82–0.85)
Harrell’s C	0.96 (0.95–0.96)	0.95 (0.94–0.96)	0.79 (0.78–0.81)	0.83 (0.82–0.85)
Brier Score	0.0006 (0.0004–0.0009)	0.0006 (0.0004–0.0008)	0.0003 (0.0002–0.00036)	0.0002 (0.0002–0.0002)
Observed-expected ratio	1.07	0.73	0.37	0.26

Observerved-expected ratios were calculated prior to recalibration in the second period. Brier scores were calculated after recalibration.