Table 3.

Knowledge of the number needed to treat and absolute risk reduction^*

	Absolute risk reduction
	Understand and could explain (%)	Some understanding (%)	Knowledge but no understanding (%)	Do not know but would like to (%)	Do not know (%)
Number needed to treat
Understand and could explain	89/234 (38)	25/234 (11)	3/234 (1)	4/234 (2)	6/234 (3)
Some understanding	9/234 (4)	37/234 (16)	4/234 (2)	5/234 (2)	0/234 (0)
Knowledge but no understanding	1/234 (0)	1/234 (0)	4/234 (2)	1/234 (0)	0/234 (0)
Do not know but would like to	0/234 (0)	4/234 (2)	1/234 (0)	8/234 (3)	2/234 (1)
Do not know	5/234 (2)	14/234 (6)	1/234 (0)	3/234 (1)	7/234 (3)

^* positive/inconsistent responses bold