Increased expression of ABO blood group antigens secretion phenotype with O blood group and age advances

Article Figures & Data

Table 1

- Healthy Yemeni participant’s gender, age, ABO phenotype, Rh groups, and secretor status.

Values are presented as numbers and percentages (%).

Table 2

- Mouth and teeth health data among healthy Yemeni participants.

Variables	n (%)
Periodontal or teeth problems
Yes	126 (58.6)
No	89 (41.4)
Brush teeth
Several times per day	12 (5.6)
Daily	27 (12.6)
Weekly	45 (20.9)
Monthly	42 (19.5)
No	89 (41.4)
Gum consumption
Yes	74 (34.4)
No	141 (65.6)
Smoking
Yes	46 (21.4)
No	169 (78.6)
Qat chawing
Yes	165 (76.7)
No	50 (23.3)

Values are presented as numbers and percentages (%).

Table 3

- Secretor prevalence and its association with Yemeni participant’s gender and age.

Variables	Secretors	Non-secretors	ORs	95% CIs	P-values
Gender
Male	112 (80.0)	28 (20.0)	1.46	0.75-2.81	0.344
Female	55 (73.3)	20 (26.7)	1.46	0.75-2.81	0.344
Age groups
10-20	32 (68.1)	15 (31.9)	-	-	-
21-30	90 (77.6)	26 (22.4)	1.62	0.76-3.44	0.205
31-40	31 (88.6)	4 (11.4)	3.63	1.09-12.16	0.026
41-50	12 (85.7)	2 (14.3)	2.81	0.56-14.18	0.172
51-60	2 (66.7)	1 (33.3)	0.94	0.08-11.17	0.695

Values are presented as numbers and percentages (%). ORs: odds ratios, CIs: confidence intervals

Table 4

- Association between secretion status with ABO and Rh blood group phenotypes.

Secretion status	Event blood group	Non-event blood group	ORs	95% CIs	P-values
	A	Non-A
Secretor	55 (72.0)	112 (81.0)	0.63	0.33-1.22	0.226
Non-secretors	21 (28.0)	27 (19.0)	0.63	0.33-1.22	0.226
	B	Non-B
Secretor	30 (71.0)	137 (79.0)	0.66	0.31-1.41	0.380
Non-secretors	12 (29.0)	36 (21.0)	0.66	0.31-1.41	0.380
	AB	Non-AB
Secretor	14 (54.0)	153 (81.0)	0.28	0.12-0.64	0.004
Non-secretors	12 (46.0)	36 (19.0)	0.28	0.12-0.64	0.004
	O	Non-O
Secretor	67 (95.0)	100 (69.0)	7.37	2.53-21.47	<0.001
Non-secretors	4 (5.0)	44 (31.0)	7.37	2.53-21.47	<0.001
	Rh positive	Rh negative
Secretor	131 (76.0)	36 (83.0)	0.62	0.26-1.50	0.390
Non-secretors	41 (24.0)	7 (17.0)	0.62	0.26-1.50	0.390

Values are presented as numbers and percentages (%). ORs: odds ratios, CIs: confidence intervals

Table 5

- Secretor frequency and its association with potential of hydrogen and consistence properties of saliva.

Saliva characteristics	Secretors	Non-secretors	ORs	95% CIs	P-values
pH
Acidic	92 (82.2)	20 (17.8)	1.72	0.90-3.29	0.140
Alkalin	75 (72.8)	28 (27.2)	1.72	0.90-3.29	0.140
Consistency
Normal watery clear	97 (75.8)	31 (24.2)	-	-	-
Frothy bubbly	34 (79.1)	9 (20.9)	1.21	0.52-2.79	0.659
Sticky frothy	36 (81.8)	8 (18.2)	1.44	0.61-3.42	0.409

Values are presented as numbers and percentages (%). ORs: odds ratios, CIs: confidence intervals

Table 6

- Secretor status frequency and association with teeth problems history.

Total teeth score	Secretors	Non-secretors	ORs	95% CIs	P-values
0	68 (76.4)	21 (23.6)	-	-	-
1	49 (80.3)	12 (19.7)	1.26	0.57-2.80	0.712
2	26 (76.5)	8 (23.5)	1.01	0.40-2.55	0.818
3	11 (78.6)	3 (21.4)	1.13	0.29-4.44	0.871
4 or more	13 (76.5)	4 (23.5)	1.01	0.30-3.41	0.760