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

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)