Table 1 Demographic characteristics of the study participants

Sex; N (%)

 Male

739 (38.5)

 Female

1,181 (61.5)

Age range; N (%)

 < 30 years

24 (1.3)

 30–39 years

109 (5.7)

 40–49 years

312 (16.3)

 50–59 years

596 (31.0)

 60–69 years

552 (28.8)

 70–79 years

277 (14.4)

 ≥ 80 years

50 (2.6)

Age; Average years (standard deviation [SD])

58.5 (21.5)

Education; N (%)

 Junior high school

27 (1.4)

 High school

511 (26.6)

 Professional training college

331 (17.2)

 College

296 (15.4)

 University/Graduate school

755 (39.3)

Marital status; N (%)

 Married

1,419 (73.9)

Family; N (%)

 Yes

1,585 (82.6)

Income (million yen/year); N (%)

 < 200

180 (9.4)

 200–600

1,017 (53.0)

 > 600

717 (37.3)

Intention to keep ideal weight; N (%)

 Yes

1,583 (82.4)

 No

337 (17.6)

Managing lifestyle for disease prevention; N (%)

 Yes

1,700 (88.5)

 No

220 (11.5)

Reading nutritional information labels; N (%)

 Always

691 (36.0)

 Often

874 (45.5)

 Rarely

277 (14.4)

 Very rarely

78 (4.1)

Maintaining a balanced diet in daily life; N (%)

 Always

1,087 (56.6)

 Often

677 (35.3)

 Rarely

142 (7.4)

 Very rarely

14 (0.7)

Intention for exercise; N (%)

 Always

897 (46.7)

 Sometimes

756 (39.4)

 In the past

214 (11.1)

 Never

52 (2.7)

Adequate exercise; N (%)

 Yes

1,282 (66.8)

 No

638 (33.2)

Excessive alcohol intake; N (%)

128 (6.7)

Smoking (%)

 Current

381 (19.8)

 Past

95 (4.9)

 None

1,435 (74.7)

Stress; N (%)

 High

353 (18.4)

 Moderate

1,030 (53.6)

 Low

451 (23.5)

 None

84 (4.4)

Rest; N (%)

 Satisfactory

451 (23.5)

 Adequate

1,027 (53.5)

 Not adequate

388 (20.2)

 Not satisfactory

51 (2.7)

Sleep; N (%)

 Satisfactory

434 (22.6)

 Adequate

1,100 (57.3)

 Not adequate

370 (19.3)

 Not satisfactory

14 (0.7)

Total health-related lifestyle score; average (SD)

 95% confidence interval

35.8 (4.15)

[35.7–36.0]