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. 2021 Nov;46(6):428–436. doi: 10.30476/ijms.2021.92080.2326

Table 4.

Factors in association with reporting any long COVID symptoms/complaints in univariate analysis

Clinical Characteristics Long COVID syndrome, N=2915 No chronic symptoms, N=1766 P value
Sex (Female:Male) 1430:1485 (ratio: 0.96) 773:993 (ratio: 0.78) 0.0001
Age (mean±SD), years 52±15 52±16 0.470
Length of hospital stay (mean±SD), days 7.7±6.8 6.1±5.3 0.0001
Respiratory problems at onset 2647 (91%) 1535 (87%) 0.0001
Neurological problems at onset 520 (18%) 298 (17%) 0.405
Gastrointestinal problems at onset 455 (16%) 276 (16%) 0.835
Pre-existing chronic medical problems 1105 (38%) 661 (37%) 0.756
ICU admission 344 (12%) 138 (8%) 0.0001