Table 6.

Mean anticipated regret of action and inaction

Study	N	Action Mean (SD)	Inaction Mean (SD)	p
Brewer, 2012	567	2.8 (1.2)	3.6 (1.8)	<.001
Chapman, 2006	428	2.3 (1.4)	3.1 (1.5)	<.001
Liao, 2013	507	2.0 (1.0)	1.7 (0.8)	<.001
McRee, 2014	543	2.0 (0.9)	3.4 (0.9)	<.001
Morison, 2010	243	3.6 (1.4)	5.4 (1.0)	<.001
Reiter, 2011 (parents)	535	2.7 (1.1)	3.2 (1.0)	<.001
Reiter, 2011 (sons)	412	2.8 (1.1)	3.1 (1.0)	<.001
Reiter, 2014	428	2.1 (0.9)	3.4 (0.8)	<.001
Wroe, 2004	190	42.3 (32.5)	89.5 (25.1)	<.001
Wroe, 2005	108	44.2 (29.0)	84.4 (24.5)	<.001
Ziarnowski, 2009	783	2.7 (1.2)	3.6 (0.8)	<.001

Note. Ten studies assessed both anticipated regret of action and inaction; all studies concerned vaccination. Higher scores indicated more anticipated regret. Studies used 5-point response scales, except for Morison (6-point response scale) and Wroe et al. (100-point response scale).