Skip to main content

Table 4 Prevalence of low GS and associations of dietary protein according to different recommended protein levels among Korean elderly in the KNHANES 2016–2019

From: Relationship between protein intake and grip strength in qualitative and quantitative aspects among the elderly in Korea: results from the Korea National Health and Nutrition Examination Survey

 

Prevalence

n (%)1

Crude model

OR (95% CI)

Adjusted model 1

OR (95% CI) 2

Adjusted model 2

OR (95% CI) 3

Adjusted model 3

OR (95% CI) 4

Men

     

<EAR5

177(33.13)

1

1

1

1

≥EAR

169(16.37)

0.395(0.297–0.526)

0.584(0.428–0.798)

0.703(0.505–0.978)

0.928(0.632–1.362)

P value

< 0.0001

< 0.0001

0.0007

0.0367

0.7012

< 0.73 g/kg6

127(27.99)

1

1

1

1

≥ 0.73 g/kg

219(19.68)

0.630(0.474–0.838)

0.677(0.485–0.944)

0.833(0.572–1.213)

1.157(0.754–1.776)

P value

0.0014

0.0016

0.0217

0.3398

0.5042

< 0.91 g/kg7

202(26.87)

1

1

1

1

≥ 0.91 g/kg

144(17.67)

0.584(0.445–0.767)

0.645(0.473–0.880)

0.784(0.562–1.094)

1.102(0.714–1.701)

P value

< 0.0001

0.0001

0.0057

0.1514

0.6607

< 1.2 g/kg

278(24.47)

1

1

1

1

≥ 1.2 g/kg

68(15.69)

0.575(0.416–0.794)

0.663(0.459–0.958)

0.802(0.550–1.171)

1.225(0.735–2.041)

P value

0.0007

0.0008

0.0286

0.2535

0.4357

Women

     

<EAR5

336(39.16)

1

1

1

1

≥EAR

273(23.14)

0.468(0.366–0.597)

0.607(0.469–0.785)

0.605(0.460–0.796)

0.528(0.373–0.749)

P value

< 0.0001

< 0.0001

0.0001

0.0003

0.0004

< 0.73 g/kg6

303(34.83)

1

1

1

1

≥ 0.73 g/kg

306(26.16)

0.663(0.528–0.833)

0.750(0.589–0.955)

0.769(0.592–0.997)

0.786(0.569–1.085)

P value

0.0003

0.0004

0.0198

0.0478

0.1428

< 0.91 g/kg7

424(32.82)

1

1

1

1

≥ 0.91 g/kg

185(24.82)

0.676(0.532–0.859)

0.726(0.567–0.929)

0.759(0.583–0.988)

0.767(0.544–1.082)

P value

0.0012

0.0014

0.0109

0.0406

0.1301

< 1.2 g/kg

525(30.87)

1

1

1

1

≥ 1.2 g/kg

84(24.00)

0.707(0.518–0.967)

0.892(0.632–1.260)

1.013(0.714–1.437)

1.228(0.819–1.842)

P value

0.0280

0.0298

0.5153

0.9410

0.3199

  1. GS: grip strength, EAR: estimated average requirement, OR: odds ratio, CI: confidence interval, BMI: body mass index
  2. 1p-value for prevalence of low GS were calculated by x2-test
  3. 2P-value after adjusting for age and BMI
  4. 3P-value after adjusting for age, BMI, household income, and walking activity
  5. 4P-value after adjusting for age, BMI, household income, walking activity, and energy intake
  6. 5Protein EAR and RNI were set as 50 g/day and 60 g/day for the elderly men and 40 g/day and 50 g/day for the elderly women
  7. 6Protein EAR per body weight
  8. 7Protein RNI per body weight