Table 2.

Detailed neutralization assay results in both the groups.

2A. Comparison of chemiluminescence assay OD S/Co with neutralization inhibition percentage among two groups
	Chemiluminescence assay (CLIA)	Total n = 90	CCP donors n = 43	WB donors n = 47	P-value
	CLIA OD S/Co 6-12 (n = 33)		(n = 28)	(n = 5)
	CLIA OD mean (range)	7.4 (6.1–11.8)	7.53 (6.1–11.8)	6.68 (6.1–7.3)	0.157
CLIA OD S/Co 6-12 (n = 33)	Inhibition mean (range)	76.16 (41.1–94.6)	76.35 (41.1–94.6)	75.1 (68.8–82.8)

	CLIA OD S/Co ≥ 12 (n = 57)			(n = 15)	(n = 42)
CLIA OD S/Co ≥ 12 (n = 57)	CLIA OD mean (range)	24.37 (12.1–42)	29.09 (12.1–42)	22.69 (12.1–39.9)	0.153
	Inhibition % mean (range)	76.38 (21.1–95.4)	79.37 (21.1–95.4)	75.31 (44.13–94.09)

2B. Demographic parameters and Inhibition percentage among two groups
Demographic parameters	Number; mean inhibition % (range)			P-value
	Total n = 90	CCP donors n = 43	WB donors n = 47
Age groups				0.199
18–29 years	34; 76 (45.3–94.09)	8; 77.5 (45.3–92.9)	26; 75.8 (47.8–94.09)
30–45 years	52; 76.6 (21.1–95.4)	33; 78.2 (21.1–95.4)	19; 73.9 (44.1–89.8)
46–60 years	4; 73.4 (45.6–89.1)	2; 65.6 (45.6–85.7)	2; 81.2 (73.3–89.1)
Gender				–
Male	89; 76.4 (21.1–95.4)	42; 77.7 (21.1–95.4)	47; 75.2 (44.1–94.0)
Female	1; 64.7 (64.7)	1; 64.7 (64.7)	0; ()
Blood groups				0.213
Group A	19; 77.7 (58.4–94.3)	10; 82.3 (64.7–94.3)	9; 72.5 (58.4–82.8)
Group AB	11; 70.6 (44.1–93.3)	2; 80.4 (75–85)	9; 68.4 (44.1–93.3)
Group B	19; 74.5 (21.1–95.4)	10; 72.9 (21.1–95.4)	9; 76.3 (50.2–90.2)
Group O	41; 77.9 (45.3–94.6)	21; 76.8 (45.3–94.6)	20; 79.1 (48.6–94.0)
Donation status				0.157
First time donor	15; 75.7 (50.25–94.6)	5; 83.4 (64.7–94.6)	10; 71.8 (50.2–93.4)
Repeat donation	75; 76.4 (21.1–95.4)	38; 76.6 (21.1–95.4)	37; 76.2 (44.1–94.9)
Type of donation				–
Voluntary donor	63; 76.6 (21.1–95.4)	43; 77.4 (21.1–95.4)	20; 75.0 (44.1–93.4)
Replacement donor	27; 75.4 (47.7–94)	0; ()	27; 75.4 (47.7–94)