Table 1

Characteristics of the subjects (n = 2,083)

N

%


Gender

Male

1,137

54.6

Female

927

44.5

Age (years)

≤29

59

2.8

30–39

184

8.8

40–49

333

16.0

50–64

802

38.5

65–79

623

29.9

≥80

66

3.2

Place of residence when the earthquake occurred

Nagaoka City

727

34.9

Ojiya City

442

21.2

Mitsuke City

171

8.2

Tohkamachi City

248

11.9

Kawaguchi Town

146

7.0

Koshiji Town

108

5.2

Yamakoshi Village

216

10.4

Employment

Farmer

236

11.3

Executive of business firm

128

6.1

Office worker

461

22.1

Government official

54

2.6

Part-time worker

167

8.0

Housewife

303

14.5

Student

5

0.2

None

201

9.6

Pensioner

295

14.2

Location when the earthquake occurred

At home

1,426

68.5

At home of friends

30

1.4

At office

132

6.3

In Car

169

8.1

In bus or train

8

0.4

In public facilities

29

1.4

In other buildings

71

3.4

Outdoors

78

3.7

Person by their side when the earthquake occurred

With someone

317

15.2

Alone

1,766

84.8

Family members living together

None

847

40.7

Income

Lost income after earthquake

21

1.0

Severity of house damage

Completely destroyed

356

17.1

Almost completely destroyed

292

14.0

Severely damaged

621

29.8

Slightly damaged

787

37.8

None

14

0.7

Timing of contact with lifeguards after the earthquake

≤1 hour

139

6.7

1< ≤ 3 hours

263

12.6

3< ≤ 6 hours

187

9.0

6< ≤ 12 hours

204

9.8

> 12 hours

998

47.9

No contact

279

13.4

Injury caused by the earthquake

No injury

1,888

90.6

Mild injury

191

9.2

Injury requiring hospitalization

4

0.2

Sickness after the earthquake

No sickness

1,870

89.8

Mild sickness

195

9.4

Sickness requiring hospitalization

18

0.9


Toyabe et al. BMC Public Health 2006 6:230   doi:10.1186/1471-2458-6-230

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