Table 2.

Differences in baseline characteristics between KTRs with SARS-CoV-2 spike S1–specific IgG >35.2 BAU/ml versus those with <35.2 BAU/ml

CharacteristicsKTR SARS-CoV-2 Spike S1–Specific IgG Level
>35.2 BAU/ml (n=10)<35.2 BAU/ml (n=18)
General
 Age (yr), median (IQR)74 (64–81)65 (60–76)
 Male sex, %7072
 BMI (kg/m2)b2526
 Diabetes, %1011
 Malignancy, %5039
Transplantation
 Time after transplantation (yr), median (IQR)12 (12–19)6 (3–11)a
 History of previous transplantation11
 Baseline eGFR (ml/min per 1.73 m2), mean±SD44±2347±18
 History of rejection within a year before vaccination, n (%)0 (0)0 (0)
Primary renal disease, n (%)
 Glomerular6 (60)6 (33)
 Vascular0 (0)2 (11)
 Interstitial2 (20)1 (6)
 Polycystic kidney disease2 (20)4 (22)
 Diabetes0 (0)2 (11)
 Other0 (0)3 (17)
Immunosuppression, n (%)
 Triple therapy5 (50)17 (94)
 Dual therapy5 (50)1 (6)a
 Basiliximab5 (20)11 (44)
 Tacrolimus8 (80)17 (94)
 Ciclosporin2 (20)1 (6)
 Mycophenolate mofetil6 (60)16 (89)
 Azathioprine0 (0)1 (6)
 Prednisolone9 (90)18 (100)
  • KTR, kidney transplant recipient; SARS-CoV-2, severe acute respiratory syndrome coronavirus 2; IQR, interquartile range; BMI, body mass index.

  • a Significant difference between groups (P<0.05) using Mann–Whitney test.

  • b Values represent mean values.