Table 2.

Noise measurements in our study population are highly correlated over the years.

	2012	2013	2014
2013	0.69
2014	0.61	0.66
2015	0.54	0.52	0.57

Spearman rank correlation coefficient (adjusted for multiple tests; Holm correction) are given for nightly noise measurements between 2012–2015. All correlations were significant (P < 0.001).