Table 2.
Comparison of kidney function and comorbid conditions between kidney stone formers and controls
| Stone formers (N = 195) | Control group (N = 390) | P-value | |
|---|---|---|---|
| Age (years) | 51 (19–70) | 51 (29–71) | - |
| Males, N (%) | 108 (55.3) | 216 (55.3) | - |
| Serum creatinine (μmol/L)a | 75 (41–140) | 64 (34–168) | < 0.001 |
| eGFR (mL/min/1.73 m2)a | 87.0 ± 20.3 | 104.0 ± 22.1 | < 0.001 |
| eGFR < 60 mL/min/1.73 m2a, N (%) | 18 (9.3) | 5 (1.3) | < 0.001 |
| BMI (kg/m2) | 28.1 (17.0-49.1) | 26.0 (17.4-45.3) | < 0.001 |
| Systolic BP (mm Hg) | 130 (86–175) | 131 (90–212) | 0.51 |
| Diastolic BP (mm Hg) | 78 (38–108) | 81 (54–122) | 0.001 |
| Hypertension, N (%) | 65 (33.3) | 86 (22.1) | 0.003 |
| Diabetes, N (%) | 15 (7.7) | 12 (3.1) | 0.02 |
| Cardiovascular disease, N (%) | 10 (5.1) | 28 (7.2) | 0.34 |
Data are presented as mean ± standard deviation for normally distributed variables, median (range) for other continuous variables and as number (%) for categorical variables
Abbreviations: BMI body mass index, BP blood pressure, eGFR estimated glomerular filtration rate
aTwo cases with only a single serum creatinine value available during a stone episode and the corresponding controls were excluded