Research Article

SARS-CoV-2 Antibodies in Hemodialysis Patients Six Months after Infection Compared to Healthcare Workers

Table 1

Characteristics of symptomatic patients on maintenance hemodialysis (N = 45) diagnosed as infected with SARS-CoV-2 from March to April of the epidemic and who were still alive 6 months later.

VariablesTotal patients, N = 45 (%)Values median [IQR1]

Age (years), median [IQR]45 (100)67.0 [59.0; 77.0]

Sex
 Women18 (40)
 Men27 (60)

Oxygen supply
 Yes22 (50)
 No22 (50)

Chest scan39 (87)
 No pulmonary injury5 (11)
 Minimal pulmonary injury (<10%)7 (16)
 Moderate pulmonary injury (10–25%)14 (31)
 Extensive to critical pulmonary injury (>25%)13 (29)

Biological parameters
 Lymphocyte nadir (1000–4800/mm3), median [IQR]45 (100)840.0 [642.0; 1274.0]
 Ferritin peak (30–400 ng/mL), median [IQR]34 (76)409.0 [233.2; 860.2]
 D-dimer peak (<500 ng/mL), median [IQR]22 (49)1276.0 [708.0; 1964.2]
 CRP peak (<5 mg/L), median [IQR]44 (98)85.0 [14.8; 178.5]
 BNP (100–400 pg/mL), median [IQR]35 (78)534.0 [286.5; 1570.5]
 Troponin (<34.2 ng/mL), median [IQR]38 (84)38.8 [20.8; 72.0]
 Neutrophil/lymphocyte ratio (<5), median [IQR]43 (96)5.0 [2.8; 13.2]

1IQR: interquartile range. Pulmonary extension was usually classified by five degrees of severity according to the French Society of Thoracic Imaging recommendations by grading lung involvement as absent or minimal (<10%), moderate (<25%), extensive (25–50%), severe (50–75%), and critical (>75%) (8). Because of the low number of hemodialysis patients with severe pulmonary injuries, extensive, severe, and critical involvement were gathered into one (>25%). Normal values.