Table 3.

Correlations between the NeH₂S level and the parameters reflecting the persistence or severity of AR symptoms

Parameters		Correlation with NeH2S level
		Correlation coefficient	p value
Course of AR (years)		0.174	0.111
SAR or PAR		~	0.135
Persistence of AR symptoms	Months with symptoms per year a	0.144	0.189
	Weeks with symptoms per month b	−0.187	0.087
	Days with symptoms per week c	−0.158	0.148
Severity of AR symptoms	Sleep disturbance d	−0.118	0.282
	Impairment of school or work d	−0.097	0.378
	Impairment of leisure or sport d	−0.021	0.851
	Impairment of other daily activities d	−0.013	0.903
Comorbidities	With or without asthma	~	0.285
	With or without rhinosinusitis	~	0.161
IgE level	Total IgE	−0.036	0.751
	Phadiatop sIgE	0.008	0.943

Abbreviations: AR, allergic rhinitis; NeH₂S, nasal exhaled hydrogen sulfide; PAR, perennial allergic rhinitis; SAR, seasonal allergic rhinitis; sIgE, specific immunoglobulin E.

^aThis parameter was divided into five levels to evaluate the correlation: 1‐less than one month, 2‐one to three months, 3‐four to six months, 4‐seven to nine months, 5‐more than ten months.

^bThis parameter was divided into four levels to evaluate the correlation: 1‐less than one week, 2‐one to two weeks, 3‐three to four weeks, 4‐every day.

^cThis parameter was divided into four levels to evaluate the correlation: 1‐less than one day, 2‐one to three days, 3‐four to six days, 4‐every day.

^dThese parameters were divided into five levels to evaluate the correlation: 0‐none, 1‐mild, 2‐moderate, 3‐severe, 4‐very severe.