Table 1.

Admission numbers of various neurodegenerative diseases and COVID-19 during the study period in 2020 and 2019, year-to-year and pre/post relative changes between phases of the first wave.

Disease	ICD−Code		Case Number					Relative Change
			Total	Prodromal	Early	Peak	Late	Peak vs. Early	Late vs. Early	Late vs. Peak
			16 Jan−15 May	16 Jan−15 Feb	16 Feb−15 Mar	16 Mar−15 Apr	16 Apr−15 May
COVID−19	U07.1	2020	30,827	90	1818	21,918	7001	1105.6%	285.1%	−68.1%
All admissions	All ICD	2019	6,254,091	1,719,250	1,509,265	1,540,771	1,484,805	2.1%	−1.6%	−3.6%
		2020	5,210,432	1,657,386	1,485,173	976,590	1,091,283	−34.2%	−26.5%	11.7%
		Diff.	−1,043,659	−61,864	−24,092	−564,181	−393,522
		Diff. %	−16.7%	−3.6%	−1.6%	−36.6%	−26.5%
All NDD	G10 + G12.2 + G20 + G23.1 + G23.2 + G23.3	2019	19,232	5239	4568	4856	4569	6.3%	0.0%	−5.9%
		2020	13,920	5102	4609	1699	2510	−63.1%	−45.5%	47.7%
		Diff.	−5312	−137	41	−3157	−2059
		Diff. %	−27.6%	−2.6%	0.9%	−65.0%	−45.1%
PD	G20	2019	15,854	4315	3782	3971	3786	5.0%	0.1%	−4.7%
		2020	11,262	4182	3819	1326	1935	−65.3%	−49.3%	45.9%
		Diff.	−4592	−133	37	−2645	−1851
		Diff. %	−29.0%	−3.1%	1.0%	−66.6%	−48.9%
MSA	G23.2 + G23.3	2019	457	127	102	120	108	17.6%	5.9%	−10.0%
		2020	341	122	115	32	72	−72.2%	−37.4%	125.0%
		Diff.	−116	−5	13	−88	−36
		Diff. %	−25.4%	−3.9%	12.7%	−73.3%	−33.3%
PSP	G23.1	2019	645	187	160	163	135	1.9%	−15.6%	−17.2%
		2020	421	146	151	52	72	−65.6%	−52.3%	38.5%
		Diff.	−224	−41	−9	−111	−63
		Diff. %	−34.7%	−21.9%	−5.6%	−68.1%	−46.7%
HD	G10	2019	139	29	31	43	36	38.7%	16.1%	−16.3%
		2020	128	46	42	19	21	−54.8%	−50.0%	10.5%
		Diff.	−11	17	11	−24	−15
		Diff. %	−7.9%	58.6%	35.5%	−55.8%	−41.7%
ALS	G12.2	2019	2137	581	493	559	504	13.4%	2.2%	−9.8%
		2020	1768	606	482	270	410	−44.0%	−14.9%	51.9%
		Diff.	−369	25	−11	−289	−94
		Diff. %	−17.3%	4.3%	−2.2%	−51.7%	−18.7%