Table 5. Antibody detection by tests in COVID-19 patients (n = 97) in different time to test groups.

Tests	Quantitative test value median (25%;75% percentiles)
	% of positive tests in subgroup
	7–14 days	15–30 days	31–57 days
	n = 20	n = 35	n = 42
SNIBE	2.02 (0.23; 17.51)	4.21 (0.8; 17.94)	5.18 (1.19; 14.02)
	55	69	79
Epitope	0.65 (0.3; 1.03)	0.73 (0.37; 0.96)	0.62 (0.36; 0.87)
	80	89	86
Euroimmun	2.43 (0.68; 4.92)1,2	5.18 (2.32; 7.88)1	4.81 (2.40; 6.83)2
	55a,b	89a	90b
Roche	3.18 (1.15; 8.24)3,4	15.05 (6.02; 51.45)3	31.90 (5.39; 43.16)4
	75	83	88
Abbott	4.27 (2.23; 6.77)	6.15 (2.67; 7.76)	5.88 (3.11; 7.65)
	85	86	83
DiaSorin	27 (6.46; 73.55)5,6	98.8 (28.7; 198)5	70.15 (30.2; 134)6
	55c,d	86c	90d
LIPS S-RBD	3.05 (1.85; 6.08)7,8	22.69 (9.31; 59.60)7	13.48 (4.68; 34.15)8
	70	91	86
LIPS N	10.49 (4.14; 35.73)	8.48 (3.38; 13.11)9	16.13 (9.12; 63.90)9
	90	89	95
Biosensor	NAe	NAe	NAe
	60	69	64

Statistical difference between quantitative data

¹p = 0.006

²p = 0.01

³p = 0.003

⁴p<0.001

⁵p = 0.003

⁶p = 0.01

⁷p<0.001

⁸p<0.001

⁹p = 0.005, and between percentage of positive results

^ap = 0.008

^bp = 0.003

^cp = 0.02

^dp = 0.003

^eNA–not applicable. Only qualitative interpretation (absence or presence of test line).