Table 3.

Associated Factors for a Positive SPT in Adulthood at Baseline, Mutually Adjusted (N=9844)

Factors	OR	p-value	[95% CI]
Positive association
Sex, male vs female	1.86	<0.001	[1.77–2.16]
Age group, years (ref: 19–<30 years)
30–<40	0.76	0.001	[0.64–0.90]
40–<50	0.73	<0.001	[0.62–0.86]
50–<60	0.54	<0.001	[0.46–0.64]
60–<70	0.47	<0.001	[0.39–0.56]
≥70	0.38	<0.001	[0.31–0.46]
SES categories (ref: normal)
High SES	1.27	<0.001	[1.14–1.41]
Parental allergy (doctor’s diagnosis), yes vs no	1.26	<0.001	[1.10–1.48]
Eosinophil, 109/L (continues absolute value)	3.54	<0.001	[2.44–5.12]
Negative association
Smoking status (ref: never smoker)
Former smoking	0.83	0.002	[0.74–0.94]
Current smoking	0.76	<0.001	[0.67–0.87]
Second-hand smoking	0.87	0.018	[0.79–0.97]

Abbreviations: CI, confidence interval; OR, odds ratio; ref, reference group; SES, socio-economic status; SPT, skin prick test.