Table 3.
Adjusted GFR and serum creatinine of kidney function by quartiles of daily total, plant, and animal protein intake per weight in Korean elderly population.
| Male (n = 1004) | Female (n = 1206) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Quartiles | Q1 | Q2 | Q3 | Q4 | p for Trend | Q1 | Q2 | Q3 | Q4 | p for Trend |
| GFR, mL/min/1.73 m2 | ||||||||||
| Total | 77.5 ± 1.1 | 76.7 ± 1.1 | 77.5 ± 1.1 | 79.0 ± 1.1 | 0.400 | 79.1 ± 2.1 | 79.1 ± 2.2 | 81.4 ± 2.2 | 80.6 ± 2.3 | 0.324 |
| Plant | 77.6 ± 1.1 | 78.2 ± 1.2 | 75.5 ± 1.2 | 75.5 ± 1.2 | 0.104 | 79.7 ± 2.0 | 79.1 ± 2.1 | 79.5 ± 2.2 | 82.0 ± 2.2 | 0.193 |
| Animal | 77.9 ± 1.3 | 77.3 ± 1.1 | 77.1 ± 1.0 | 77.1 ± 1.0 | 0.769 | 78.2 ± 2.1 | 81.3 ± 2.1 | 80.2 ± 2.2 | 80.4 ± 2.3 | 0.203 |
| Creatinine, mg/dL | ||||||||||
| Total | 1.00 ± 0.02 | 1.01 ± 0.01 | 1.00 ± 0.01 | 0.98 ± 0.01 | 0.360 | 0.76 ± 0.02 | 0.76 ± 0.02 | 0.74 ± 0.02 | 0.75 ± 0.02 | 0.560 |
| Plant | 1.00 ± 0.02 | 0.99 ± 0.02 | 1.03 ± 0.02 | 0.97 ± 0.01 | 0.057 | 0.76 ± 0.02 | 0.77 ± 0.02 | 0.76 ± 0.02 | 0.73 ± 0.02 | 0.062 |
| Animal | 0.99 ± 0.02 | 1.00 ± 0.01 | 1.00 ± 0.01 | 0.99 ± 0.01 | 0.791 | 0.76 ± 0.02 | 0.74 ± 0.02 | 0.75 ± 0.02 | 0.76 ± 0.02 | 0.244 |
Q, quartile; GFR, glomerular filtration rate. Adjusted for age (year), BMI (kg/m2), physical activity (MET/week), household income quartiles, current smoking status (yes or no), and alcohol intake frequency per week (0, 1, 2≤). Participants were divided into quartiles for daily animal, plant, and total protein intake per weight (g/kg/day); male animal (Q1 < 0.13, Q2 0.13–0.29, Q3 0.30–0.56, Q4 0.56<), female animal (Q1 < 0.07, Q2 0.07–0.21, Q3 0.21–0.40, Q4 0.40<), male plant (Q1 < 0.45, Q2 0.45–0.61, Q3 0.62–0.79, Q4 0.79<), female plant (Q1 < 0.42, Q2 0.42–0.57, Q3 0.58–0.74, Q4 0.74<), male total (Q1 < 0.70, Q2 0.70–0.97, Q3 0.98–1.30, Q4 1.30<), female total (Q1 < 0.59, Q2 0.59–0.82, Q3 0.83–1.14, Q4 1.14<).