Table 1 Area descriptions and backgrounds of elderlies in each household

Latitude of area^a (°N)

43.03

38.16

35.53

35.41

35.36

34.42

33.51

32.44

Average year value of mean air temperature in August^a (°C)

22.3

24.2

26.6

27.4

26.7

28.3

27.4

27.9

Average year value of days with temperatures exceeding 30 °C^a (days)

8.0

17.9

52.9

48.5

42.3

54.9

54.5

54.2

Average year value of mean relative humidity in August^a (%)

75

81

N.A.

71

78

71

N.A.

75

Number of responses (n)

763

410

488

3,386

363

663

258

125

6,456

Sex

 Male (%)

47.4

55.6

56.4

52.6*

61.2*

55.8*

53.1

43.2

53.1*

Age

 Average [years, (SD)]

74.2* (7.2)

74.8* (7.4)

74.2* (7.8)

75.0* (7.4)

73.3* (7.0)

74.3* (7.4)

74.6* (7.4)

75.8* (7.5)

74.7* (7.4)

Respondent

 Surrogate reporting (%)

77.1

82.2

73.4

77.8

65.8

70.1

78.7

80.8

76.3

Room

 Sitting cum bedroom (%)^b

19.1*

20.0

26.0

30.5*

24.0*

31.2*

31.4*

25.6

27.8*