A review identified four studies of memory loss at least six months post-ECT (n = 597), with a frequency range of 51% to 79%, and a weighted average of 70% (Rose et al., 2003). Four studies (n = 703) found a range for “persistent or permanent memory loss” of 29% to 55%, with a weighted average of 38%. The New Zealand Government report concluded that “ECT may permanently affect memory” (Ministry of Health, 2004) and bemoaned the “slowness in acceptance by some professional groups that such outcomes are real and significant in people’s lives”.