Table 1. Adjusted odds ratios of death in COVID-19 cases reported to national surveillance, Italy, 28 January–31 March 2020 (n = 97,942).

		Crude OR	95% CI	p value	AOR	95% CI	p value
Age (years)	< 40	1.00	Reference		1.00	Reference
	40–49	3.16	2.05–4.85	< 0.001	3.27	2.12–5.02	< 0.001
	50–59	9.02	6.11–13.33	< 0.001	8.49	5.74–12.55	< 0.001
	60–69	33.16	22.63–48.59	< 0.001	26.29	17.93–38.56	< 0.001
	70–79	103.62	70.89–151.44	< 0.001	80.75	55.20–118.13	< 0.001
	80–89	173.32	118.59–253.30	< 0.001	158.00	107.99–231.17	< 0.001
	≥ 90	174.27	118.61–256.04	< 0.001	202.29	137.42–297.78	< 0.001
Sex	Male vs female	1.85	1.77–1.93	< 0.001	1.85	1.76–1.94	< 0.001
Healthcare worker	Yes vs no/not indicated	0.02	0.01–0.03	< 0.001	0.12	0.08–0.17	< 0.001
Calendar week period of diagnosis (as described in the Methods)	Per 1 week increase	0.64	0.63–0.65	< 0.001	0.59	0.57–0.60	< 0.001

AOR: adjusted odds ratio; CI: confidence interval; OR: odds ratio.

This analysis includes 97,942 of 98,716 (99.2%) cases. The remaining 774 cases were excluded because data on age, sex and/or calendar week were missing. AOR were calculated from a multilevel logistic model clustered on reporting regions/autonomous provinces.

Source: Italian National Integrated Surveillance for COVID−19 (extracted on 31 March 2020).