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Table 1 Characteristics of the study participants across tertiles of the DII score

From: The association of dietary inflammatory index with urinary risk factors of kidney stones formation in men with nephrolithiasis

  Total Dietary inflammatory index score
N = 264 Tertile 1 (n = 88) Tertile 2 (n = 88) Tertile 3 (n = 88) P value
Age (year) 42.68 ± 0.78 41.58 ± 1.31 43.83 ± 1.38 42.64 ± 1.37 0.50
Height (cm) 173.52 ± 0.47 173.18 ± 0.78 173.56 ± 0.86 173.81 ± 0.84 0.86
Weight (kg) 80.73 ± 0.86 80.93 ± 1.60 81.36 ± 1.51 79.92 ± 1.39 0.78
BMI (kg/m2) 26.75 ± 0.24 26.94 ± 0.47 26.93 ± 0.42 26.37 ± 0.37 0.55
Physical activity score 4851 ± 453 6654 ± 991 3413 ± 669 4486 ± 611 0.01
Energy intake (kcal/day) 2435.86 ± 35.44 2205.91 ± 44.04 2380.07 ± 59.24 2721.61 ± 66.05 ≤ 0.001
Urinary creatinine/kg weight (mg/day)/kg 26.50 ± 0.49 24.48 ± 0.87 25.51 ± 0.92 29.51 ± 0.63 ≤ 0.001
Urinary citrate (mg/day) 350.94 ± 9.69 394.30 ± 18.43 358.42 ± 17.25 300.10 ± 12.74 ≤ 0.001
Urinary oxalate (mg/day) 45.99 ± 1.18 44.73 ± 2.12 48.72 ± 2.13 44.52 ± 1.88 0.26
Urinary uric acid (g/day) 857.61 ± 17.09 789.06 ± 32.06 823.79 ± 28.21 959.98 ± 25.28 ≤ 0.001
Urinary calcium (mg/day) 329.02 ± 8.02 288.25 ± 12.74 325.11 ± 15.52 373.70 ± 11.74 ≤ 0.001
Job status      0.22
 Engineer/physician 12 2 5 5  
 Clerk 57 20 19 18  
 Student 4 2 0 2  
 Teacher 4 2 0 2  
 Self-employed 77 28 28 21  
 Retired 47 14 19 14  
 Worker 60 20 14 26  
 Unemployed 3 0 3 0  
Marital status      0.82
 Married 241 81 81 79  
 Single 23 7 7 9  
Education level      0.68
 Illiterate 10 3 4 3  
  ≤ Diploma 190 59 66 65  
 University degree 64 26 18 20  
  1. Categorical variables are presented as frequency (n), and continuous variables as mean ± S.E. One-way ANOVA was used for continuous variables and person’s Chi square test for categorical variables