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Table 1 Sample sizes at each survey year for pre-reform and post-reform groups

From: Aging of severely mentally ill patients first admitted before or after the reorganization of psychiatric care in Sweden

Survey year 1996 2001 2006 2011
Pre-reform group
 Participated 277 272 182 158
 Did not participate 174 127 138 97
 Died before surveya 52 131 196
 Total 451 451 451 451
Post-reform group
 Participated 74 86 71 75
 Did not participate 124 100 89 59
 Died before survey 12 38 64
 Total 198 198 198 198
  1. aDied before Survey indicates cumulative number of deaths to that year, i.e., an additional 79 people in the pre-reform group died between 2001 and 2006 for a total number of deaths prior to the 2006 survey of 131