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Table 1 Deaths for residential school (RS) population and controls by cohort and sex. As the follow-up times vary, the numbers are not comparable between the cohorts

From: Adolescents in a residential school for behavior disorders have an elevated mortality risk in young adulthood

Cohort Males Females Both
RS Controls RS Controls RS Controls
1991 N (deaths/all) 25/150 10/722 4/48 4/239 29/198 14/961
16.7 % 1.4 % 8.3 % 1.7 % 14.6 % 1.5 %
1996 N (deaths/all) 11/142 11/689 5/64 2/313 16/206 13/1002
7.7 % 1.6 % 7.8 % 0.6 % 7.8 % 1.3 %
2001 N (deaths/all) 10/143 8/697 0/74 1/363 10/217 9/1060
7.0 % 1.1 % 0.0 % 0.3 % 4.6 % 0.8 %
2006 N (deaths/all) 3/159 6/783 1/105 0/510 4/264 6/1293
1.9 % 0.8 % 1.0 % 0.0 % 1.5 % 0.5 %
Total N (deaths/all) 49/594 35/2891 10/291 7/1425 59/885 42/4316
8.2 % 1.2 % 3.4 % 0.5 % 6.7 % 1.0 %
  HR (95 % CI) 6.93 (4.46–10.75) 7.05 (2.68–18.53) 6.95 (4.66–10.37)