Table 1 Baseline characteristics of study participants by tertile of dietary acid load
From: The association between dietary acid load and risk of gallstone: a case-control study
| Â | PRAL (mEq/day) | NEAP (mEq/day) | ||||||
|---|---|---|---|---|---|---|---|---|
Tertile 1 (n = 177) | Tertile 2 (n = 177) | Tertile 3 (n = 177) | P value | Tertile 1 (n = 177) | Tertile 2 (n = 177) | Tertile 3 (n = 177) | P value | |
Cases, n (%) | 55 (29) | 63 (33) | 71 (38) | 0.047 | 53 (28) | 64 (34) | 72 (38) | 0.046 |
Men, n (%) | 42 (24) | 70 (40) | 90 (51) | < 0.001 | 43 (24) | 75 (43) | 84 (47) | < 0.001 |
Age (y) | 52.1 ± 12.4 | 54.1 ± 12.4 | 52.3 ± 14.8 | 0.287 | 52.6 ± 12.3 | 54.3 ± 12.8 | 51.8 ± 14.5 | 0.198 |
Alcohol drinker | 2 (1) | 5 (3) | 6 (3.5) | 0.359 | 2 (1) | 6 (3.5) | 5 (3) | 0.356 |
Smoker, % | 14 (8) | 31 (17) | 33 (19) | 0.007 | 16 (9) | 31 (18) | 31 (18) | 0.034 |
IPAQ level, % 1 2 3 | 125 (71) 125 (71) 150 (85) | 42 (24) 50 (28) 23 (13) | 10 (5) 2 (1) 4 (2) | 0.001 | 124 (70) 124 (70) 152 (85) | 44 (25) 49 (28) 22 (13) | 9 (5) 3 (2) 4 (2) | 0.001 |
Weight, kg | 73.6 ± 12.7 | 73.2 ± 12.1 | 72.9 ± 15.4 | 0.886 | 73.2 ± 12.8 | 74.3 ± 12.7 | 72.3 ± 14.9 | 0.388 |
Height, cm | 163.5 ± 8.8 | 164.8 ± 8.6 | 165.8 ± 8.8 | 0.039 | 163.6 ± 9.3 | 165.5 ± 8.2 | 165.1 ± 8.7 | 0.100 |
BMI, kg/m2 | 27.5 ± 4.1 | 26.9 ± 3.9 | 26.4 ± 4.9 | 0.060 | 27.3 ± 3.8 | 27.1 ± 4.4 | 26.4 ± 4.7 | 0.153 |