Table 1. Characteristics of study location, total mortality, and prevalence of air conditioners.
| City | Latitude | Population 2005 (’000) |
Daily total mortality | Prevalence of air conditionersa (%) |
|||
| Total | Age >64 years (%) |
Mean | (Min, Max) | ||||
| Sapporo | 43° 4′N | 1882 | 70 437 | 80.8 | 32.1 | (15, 57) | 15.9 |
| Sendai | 38° 16′N | 1025 | 34 025 | 81.6 | 15.5 | (4, 33) | 76.5 |
| Tokyo | 35° 41′N | 12 577 | 357 480 | 82.1 | 163.2 | (108, 247) | 94.4 |
| Nagoya | 35° 10′N | 2215 | 93 415 | 82.4 | 42.6 | (21, 73) | 98.4 |
| Osaka | 34° 41′N | 2629 | 128 726 | 81.2 | 58.8 | (31, 94) | 97.6 |
| Fukuoka | 33° 35′N | 1401 | 47 475 | 81.1 | 21.7 | (6, 44) | 95.2 |
aFor households with ≥2 members, based on the 2004 National Survey of Family Income and Expenditure, Statistics Bureau of Japan.