TABLE 4.

Achieving humoral IgG response after booster vaccination (logistic regression).

Risk factor	OR	95% CI	P-value
Anti-SpikeS1 IgG after two doses	1.360	[1.167,1.584]	<0.001
Time between 2nd and 3rd doses	0.972	[0.855,1.106]	0.668
1st and 2nd dose with 1273-mRNA (ref = BNT162b2-mRNA)	4.420	[1.208,16.173]	0.025
3rd dose with 1273-mRNA (ref = BNT162b2-mRNA)	1.080	[0.537,2.171]	0.830
Sex (ref = female)	1.339	[0.547,3.278]	0.523
Age	0.975	[0.946,1.005]	0.107
Time after transplantation (years)	1.028	[0.954,1.106]	0.471
HepB vaccination failure	1.502	[0.231,9.748]	0.670
MMF/MPA (ref = yes)	7.086	[0.917,54.730]	0.060
Diabetes mellitus (ref = yes)	0.610	[0.182,2.044]	0.423

Logistic regression on achieving anti-SpikeS1 IgG response 4 weeks after 3rd SARS-CoV-2 vaccination. MMF-MPA, mycophenolate mofetil or mycophenolic acid.