Table 2. Prefectural rank of aSAH incidence calculated with hospitals reporting 10 or more patients.
| Prefecture (Incidence of aSAH per 100,000 people) | |||
|---|---|---|---|
| Rank | 2010* | 2011 | 2012 |
| 1 | Aomori (24.4) | Aomori (18.6) | Aomori (21.6) |
| 2 | Iwate (16.3) | Yamagata (18.5) | Iwate (17.1) |
| 3 | Kumamoto (15.0) | Iwate (15.8) | Kumamoto (15.3) |
| 4 | Akita (13.1) | Akita (14.2) | Akita (14.2) |
| 5 | Kochi (12.9) | Kochi (13.6) | Gunma (13.8) |
| 6 | Tottori (12.5) | Kumamoto (12.8) | Yamagata (13.5) |
| 7 | Tochigi (12.0) | Tokushima (12.2) | Yamaguchi (13.4) |
| 8 | Yamagata (11.9) | Wakayama (11.9) | Kochi (13.0) |
| 9 | Okayama (11.6) | Nagano (11.9) | Fukuoka (12.2) |
| 10 | Wakayama (11.6) | Nagasaki (10.8) | Tochigi (11.5) |
| 38 | Yamanashi (7.0) | Nara (7.0) | Kyoto (7.7) |
| 39 | Kanagawa (6.5) | Osaka (6.8) | Kagoshima (7.7) |
| 40 | Toyama (6.1) | Fukui (6.7) | Osaka (7.4) |
| 41 | Miyazaki (6.0) | Kanagawa (6.7) | Kanagawa (7.3) |
| 42 | Shimane (6.0) | Yamanashi (5.8) | Ishikawa (7.2) |
| 43 | Ehime (5.7) | Shiga (5.8) | Shimane (6.9) |
| 44 | Ishikawa (5.4) | Kyoto (5.2) | Ehime (6.5) |
| 45 | Shiga (4.8) | Oita (5.0) | Nara (6.5) |
| 46 | Kyoto (4.3) | Ehime (4.9) | Shiga (4.3) |
| 47 | Oita (3.1) | Shimane (4.4) | Toyama (4.1) |
*The number is estimated by multiplying 4/3 times, since the analyzed term is 9 months.