Table 2.

Estimates of the proportion of the population of Hong Kong annoyed, or self-reporting sleep disturbance, by road traffic noise

	% of the sample	95% confidence interval of the % in the HK population
Annoyed with road traffic noise (over whole day)
Highly annoyed	7.9%	7.4 to 8.4%
Annoyed	24.6%	23.7 to 25.4%
(at least) A little annoyed	47.8%	46.8 to 48.8%
Annoyed with road traffic noise (at night)
Highly annoyed at night	5.0%	4.5 to 5.4%
Annoyed at night	15.7%	15.0 to 16.4%
(at least) A little annoyed at night	36.1%	35.2 to 37.0%
(Self-reported) Sleep disturbed by road traffic noise
Highly sleep disturbed	4.1%	3.7 to 4.5%
Sleep disturbed	11.3%	10.7 to 11.9%
(at least) A little sleep disturbed	27.3%	26.4 to 28.2%