Table 1.

Baseline characteristics

	Typical presentation of COVID-19 (n = 706)	Atypical presentation of COVID-19 (n = 74)	p value
Demographics
Age (years), median (IQR)	79 (10)	80 (10)	0.044
Male sex, n (%)	416 (58.9%)	38 (51.4%)	0.209
Living in an institution, n (%)	73 (10.3%)a	11 (14.9%)b	0.247
BMI, mean (SD)	27.4 (4.7)c	24.9 (6.2)d	< 0.001
PCR confirmed COVID-19, n (%)	620 (88.8%)e	62 (84.9%)f	0.322
Comorbidity
History of myocardial infarction, n (%)	135 (19.1%)g	10 (13.5%)	0.236
History of heart failure, n (%)	151 (21.4%)h	12 (16.2%)	0.295
History of diabetes mellitus, n (%)	213 (30.2%)i	26 (35.1%)	0.400
History of chronic obstructive pulmonary disease (COPD), n (%)	144 (20.4%)j	9 (12.2%)	0.088
History of hypertension, n (%)	426 (60.3%)	46 (62.2%)	0.760
History of malignancy, n (%)	78 (11.0%)k	7 (9.5%)l	0.683
History of depression, n (%)	24 (3.4%)	7 (9.5%)	0.011
History of smoking, n (%)	314 (44.5%)m	32 (43.2%)n	0.910
History of dementia, n (%)	57 (8.1%)o	12 (16.2%)	0.019
CCI total, median (IQR)	2 (2)p	2 (3)q	0.803
Disease severity indicators
Duration of symptoms until admission (days), median (IQR)	6 (7)r	7 (8)s	0.940
Duration of hospital stay (days), median (IQR)	6 (7)t	6 (7)	0.660
Respiratory rate (breaths/min), mean (SD)	22 (6.7)u	19 (6.1)v	< 0.001
C-reactive protein (mg/L), median (IQR)	77 (99)w	63 (87)x	0.010

IQR interquartile range, SD standard deviation

^aTotal 669 (37 missing)

^bTotal 71 (3 missing)

^cTotal 590 (116 missing)

^dTotal 55 (19 missing)

^eTotal 698 (8 missing)

^fTotal 73 (1 missing)

^gTotal 705 (1 missing)

^hTotal 705 (1 missing)

ⁱTotal 701 (5 missing)

^jTotal 704 (2 missing)

^kTotal 690 (26 missing)

^lTotal 71 (3 missing)

^mTotal 527 (179 missing)

ⁿTotal 53 (21 missing)

^oTotal 704 (2 missing)

^pTotal 691 (15 missing)

^qTotal 72 (2 missing)

^rTotal 648 (58 missing)

^sTotal 64 (10 missing)

^tTotal 704 (2 missing)

^uTotal 649 (57 missing)

^vTotal 71 (3 missing)

^wTotal 632 (74 missing)

^xTotal 67 (7 missing)