Mean (SD), median and range (in square brackets) for the total number of hospital admissions with systemic disease in 15-year time periods before and after study entry
| Time period | Systemic disease | Mild head injury | Other injury control | Community control |
|---|---|---|---|---|
| From 1980 to study entry | Number of admissions | 2.87 (4.59) | 2.03 (4.25) | 1.72 (2.84) |
| 1 [0 : 49] | 1 [0 : 104] | 1 [0 : 44] | ||
| Total length of stay (days) | 14.36 (35.52) | 12 (38.66) | 9.36 (32.73) | |
| 3 [0 : 584] | 2 [0 : 830] | 2 [0 : 978] | ||
| From study entry to 2011 | Number of admissions | 7.34 (11.72) | 5.84 (9.91) | 3.49 (8.32) |
| 4 [0 : 197] | 3 [0 : 211] | 1 [0 : 224] | ||
| Total length of stay (days) | 13.69 (27.27) | 31.71 (65.53) | 4.13 (9.47) | |
| 5 [0 : 392] | 6 [0 : 745] | 1 [0 : 224] |