Table 4.

Results from the knowledge rating scale relative to age

Age group	n	Mean	Standard deviation	Median	P
<21 years	21	1.43	1.287	1	<0.001
21-30 years	268	2.05	1.107	2
31–40 years	520	2.36	1.133	2
41–50 years	283	2.11	1.203	2
51–60 years	183	1.98	1.160	2
61–70 years	110	1.85	1.060	2
71–80 years	52	1.33	0.985	1
81–90 years	7	1.00	1.000	1
>90 years	1	0.00	–	0
Total	1445	2.11	1.164	2