Table 2 Logistic regression models analyzing the relationship between functional independence and sample characteristics

Age group, years

70 ~ 79

1.46 (1.22–1.75)^**

1.40 (1.15–1.69)^**

80~

4.36 (3.17–5.99)^**

3.62 (2.59–5.09)^**

Gender

Female

1.31 (1.12–1.54)^**

1.12 (0.94–1.33)

Marital status

Single

1.60 (1.32–1.94)^**

1.05 (0.85–1.30)

Education level

Middle school

0.56 (0.46–0.69)^**

0.65 (0.53–0.80)^*

High school or above

0.49 (0.41–0.59)^**

0.54 (0.45–0.66)^**

Employment status

Unemployed

1.72 (1.21–2.44)^**

1.34 (0.93–1.93)

Individual economic

Good

0.77 (0.66–0.90)^**

0.75 (0.64–0.89)^**

Body mass index,kg/m²

<18.5

1.16 (0.79–1.71)

0.94 (0.63–1.42)

24 ~ 27.9

0.91 (0.77–1.08)

0.92 (0.77–1.10)

≥28

1.07 (0.82–1.40)

0.95 (0.71–1.25)

No. of chronic diseases

1

1.32 (1.08–1.63)^**

1.22 (0.98–1.51)

≥2

2.21 (1.82–2.69)^**

2.06 (1.68–2.53)^**