Table 1.

Number of participants providing saliva samples in the HYENA study, by country and noise exposure at residence.

Country	Aircraft noise exposure [LAeq,24h (dB)]			No. of subjects
	< 50	≥ 50 to < 60	≥ 60
United Kingdom	35	5	47	87
Germany	43	17	19	79
Greece	10	48	10	68
The Netherlands	23	16	23	62
Italy	19	27	12	58
Sweden	44	29	12	85
Total	174	142	123	439