Sensitisation to Pollen Allergens in Children and Adolescents of Different Ancestry Born and Living in the Same Area

Figures & data

Figure 1 Participant flow chart.

Table 1 Participants’ Demographic and Allergy-Related Characteristics, by Age (Children vs Adolescents) and Ancestry (Spanish vs Moroccan Descent)

	% Females	p value	% with Atopy	p value	N Pollens Causing Sensitisation, IQR	p value
Children (n=332)	167 (50.3%)	<0.05	136 (41%)	0.0001	1–3	0.03
Adolescents (n=361)	206 (57.1%)		213 (59%)		1–4
Spanish descent (n=574)	316 (55%)	0.003	293 (51%)	n.s.	1–4	n.s.
Moroccan descent (n=119)	59 (50%)		57 (48%)		1–4
Children of Spanish descent (n=267)	139 (52%)	<0.05	109 (41%)	n.s.	1–3	n.s.
Children of Moroccan descent (n=65)	29 (44%)		27 (42%)		1–2
Adolescents of Spanish descent (n=307)	175 (57%)	n.s.	181 (59%)	n.s.	1–4	n.s.
Adolescents of Moroccan descent (n=54)	31 (58%)		30 (56%)		1–4

Note: In bold significant differences.

Abbreviations: n.s., non-statistically significant differences; IQR, Interquartile range.

Figure 2 Pollen sensitisation in children vs adolescents.

Abbreviations: n.s., non-statistically significant differences.

Table 2 Participants’ Clinical Characteristics, by Age (Children vs Adolescents) and Ancestry (Spanish vs Moroccan Descent)

	Rhinitis	p value	Conjunctivitis	p value	Asthma	p value	Rhinitis+ Asthma	p value
Children (n=332)	116 (35%)	<0.0001	90 (27%)	<0.0001	50 (15%)	n.s.	46 (13.9%)	<0.007
Adolescents (n=361)	188 (52%)		155 (43%)		58 (16%)		88 (24.5%)
Spanish descent (n=574)	264 (46%)	0.03	224 (39%)	0.02	97 (17%)	n.s.	141 (24.5%)	0.007
Moroccan descent (n=119)	43 (36%)		30 (25%)		14 (12%)		16 (13.9%)
Children of Spanish descent (n=267)	101 (38%)	<0.05	77 (29%)	n.s.	48 (18%)	<0.05	45 (17%)	<0.05
Children of Moroccan descent (n=65)	16 (25%)		13 (20%)		6 (9%)		2 (2.6%)
Adolescents of Spanish descent (n=307)	160 (52%)	n.s.	141 (46%)	<0.01	49 (16%)	n.s.	75 (24.3%)	n.s.
Adolescents of Moroccan descent (n=54)	25 (47%)		16 (30%)		10 (18%)		11 (20%)

Note: In bold significant differences.

Abbreviations: n.s., non-statistically significant differences.

Figure 3 Pollen sensitisation in Spanish vs Moroccan adults.

Abbreviations: n.s., non-statistically significant differences.

Table 3 Bivariate Analysis for Sensitisation to Each Pollen and the Risk of Experiencing the Clinical Entities

Allergen	Rhinitis OR (95% CI)	Asthma OR (95% CI)	Rhinitis + Asthma OR (95% CI)
Olea europaea	2.81 (2.01–4.01)	1.63 (1.04–2.56)	1.63 (2.15–3.48)
Phleum pratense	2.53 (1.69–3.9)	1.97 (1.19–3.2)	2.48 (1.46–4.18)
Cupressus arizonica	2.57 (1.59–4.24)	1.77 (0.99–3.19)	2.04 (1.10–3.75)
Artemisia vulgaris	2.5 (1.16–5.60)	3.29 (1.48–7.30)	4.04 (1.81–9.01)
Platanus acerifolia	1.57 (0.77–3.19)	4 (1.91–8.35)	4.28 (2.02–9.09)
Parietaria judaica	2.31 (1.00–5.31)	1.33 (0.48–3.64)	1.75 (0.63–4.81)
Ole e 1	1.7 (0.88–3.30)	0.6 (0.254–1.43)	0.73 (0.3–1.78)
Ole e 7	3.38 (0.92–12.44)	1.1 (0.29–4.1)	1.19 (0.31–4.57)

Note: In bold significant differences.

Abbreviations: CI, confidence interval; OR, odds ratio.