Age (years)	Liverpool	UK Norm	p Value
<18	9.3 (7.6)	Not available
18–24	8.8 (9.9)	5.2 (7.6)	<0.001
25–34	8.2 (8.9)	5.3 (6.2)	<0.001
35–44	7.8 (8.6)	5.9 (7.0)	<0.001