Research Article
Nephrolithiasis and Polycystic Ovary Syndrome: A Case-Control Study Evaluating Testosterone and Urinary Stone Metabolic Panels
Table 1
Bivariate analysis using PCOS status within case-control cohort.
| | PCOS (n = 74) | No PCOS (n = 222) | value | N |
| Mean ± SD age (range) | 35.9 ± 11.8 | (13–73) | 36.0 ± 11.7 | (13–73) | 0.989 | 296 | Mean ± SD kg/m2 BMI (range) | 31.2 ± 7.4 | (17.9–54.5) | 31.0 ± 7.3 | (18.6–55.0) | 0.865 | 296 | Mean ± SD 24 hr urine panel (range): | Calcium (mg/day) | 211.2 ± 128.3 | (35.5–913.6) | 214.7 ± 119.7 | (16.7–817.1) | 0.848 | 251 | Citrate (mg/day) | 624.1 ± 361.9 | (82–1903) | 527.5 ± 317.8 | (4–1546) | 0.083 | 220 | Creatinine (g/day) | 1.3 ± 0.4 | (0.6–3.2) | 1.3 ± 0.41 | (0.1–2.9) | 0.316 | 230 | Oxalate (mg/day) | 38.4 ± 15.2 | (17–113) | 39.1 ± 20.8 | (0–180) | 0.777 | 224 | Sodium (mmol/day) | 135.7 ± 52.0 | (49–283) | 158.8 ± 76.3 | (28–442) | 0.015 | 211 | Uric acid (mg/day) | 520.2 ± 194.6 | (179–1016) | 550.1 ± 210.2 | (30.3–1361.3) | 0.319 | 231 | Volume (ml/day) | 1643 ± 793.6 | (581–3440) | 1690 ± 789.9 | (310–4450) | 0.712 | 188 | No. abnormality (%): | Hypercalciuria (>200 mg/day) | 35 | (53.9%) | 87 | (46.8%) | 0.402 | 251 | Hypocitraturia (<550 mg/day) | 24 | (44.4%) | 95 | (57.2%) | 0.139 | 220 | Hyperoxaluria (>40 mg/day) | 20 | (34.5%) | 58 | (34.9%) | 1.000 | 224 | Hypernatriuria (>150 mmol/day) | 15 | (28.9%) | 81 | (50.9%) | 0.009 | 211 | Hyperuricosuria (>750 mg/day) | 8 | (13.3%) | 29 | (17.0%) | 0.650 | 231 | Low volume (<2000 ml/day) | 35 | (66.0%) | 93 | (68.9%) | 0.839 | 188 | Mean ± SD stone composition % (range): | CaOMH | 45.4 ± 31.2 | (0–90) | 38.1 ± 31.4 | (0–90) | 0.286 | 239 | CaODH | 16.9 ± 19.0 | (0–60) | 17.0 ± 20.4 | (0–90) | 0.985 | 239 | CaPh | 25.2 ± 29.0 | (0–90) | 32.4 ± 34.6 | (0–100) | 0.270 | 239 | CaHPh | 4.6 ± 17.2 | (0–80) | 2.0 ± 11.7 | (0–90) | 0.479 | 239 | MAP | 2.5 ± 12.3 | (0–60) | 3.2 ± 12.9 | (0–70) | 0.791 | 239 | UA | 1.7 ± 4.8 | (0–20) | 3.4 ± 15.9 | (0–100) | 0.240 | 239 | No. greater than 70% mixed (%) | 11 | (45.8%) | 94 | (43.7%) | 1.000 | 239 | No. 70% or greater pure (%) | | | | | 0.261 | 239 | CaOMH | 9 | (69.2%) | 48 | (39.7%) | | | CaODH | 0 | (0%) | 8 | (6.6%) | | | CaPh | 3 | (23.1%) | 54 | (44.6%) | | | CaHPh | 1 | (7.7%) | 3 | (2.5%) | | | MAP | 0 | (0%) | 2 | (1.7%) | | | UA | 0 | (0%) | 6 | (5.0%) | | |
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Stones qualified as pure if the dominant component made up ≥ 70% of the stone. |