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Table 2 Association between BMI and MCI in older adults and subgroups. Values are odds ratio (95% confidence interval)

From: Body mass index and mild cognitive impairment among rural older adults in China: the moderating roles of gender and age

BMI

All (n = 3242)

Men (n = 1181)

Women (n = 2061)

Aged 60–74 (n = 2499)

Aged 75–100 (n = 743)

Model 1

Model 2

Model 1

Model 2

Model 1

Model 2

Model 1

Model 2

Model 1

Model 2

Low BMI

2.72*** (1.66–4.43)

2.08** (1.26–3.44)

0.68 (0.23–1.98)

0.57 (0.18–1.77)

2.41*** (1.63–3.57)

2.06** (1.35–3.12)

1.56 (0.84–2.91)

1.48 (0.74–2.98)

3.65** (1.60–8.31)

3.20** (1.34–7.45)

Normal BMI

1.00 (reference)

1.00 (reference)

1.00 (reference)

1.00 (reference)

1.00 (reference)

1.00 (reference)

1.00 (reference)

1.00 (reference)

1.00 (reference)

1.00 (reference)

Elevated BMI

0.73* (0.56–0.95)

0.86 (0.65–1.12)

1.03 (0.72–1.46)

1.24 (0.84–1.81)

0.64** (0.50–0.83)

0.73* (0.56–0.96)

0.63** (0.46–0.86)

0.66* (0.47–0.93)

1.25 (0.78–1.99)

1.65 (0.97–2.82)

High BMI

0.50*** (0.34–0.73)

0.55** (0.37–0.82)

0.74 (0.42–1.30)

0.91 (0.50–1.65)

0.47*** (0.33–0.67)

0.52** (0.36–0.75)

0.55** (0.37–0.84)

0.53** (0.33–0.84)

0.51 (0.23–1.14)

0.44 (0.18–1.07)

  1. Model 1 was unadjusted
  2. Model 2 was adjusted for age, gender, education, marital status, household income, cigarette, alcohol consumption, physical activity, activities of daily livings, mental health
  3. BMI body mass index, MCI mild cognitive impairment
  4. *p < 0.05; **p < 0.01; ***p < 0.001