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Impact of the adherence to medical treatment on the main urinary metabolic disorders in patients with kidney stones |
Braulio Omar Manzoa,*(),Jose David Cabreraa,Esteban Emilianib,Hector Manuel Sáncheza,Brian Howard Eisnerc,Jose Ernesto Torresa
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a Urology Department, Hospital Regional de Alta Especialidad del Bajío, Blvd. Milenio #130, Col. San Carlos la Roncha, León, Guanajuato, Mexico b Urology Department, Fundación Puigvert, Universidad Autónoma de Barcelona, Barcelona, Spain c Urology Department, Massachusetts General Hospital, Harvard Medical School, Boston, USA |
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Abstract Objective: To assess the effect of the adherence to medical treatment on urinary parameters in the 24-h metabolic study of patients with kidney stones. Methods: A retrospective, longitudinal, descriptive, and observational study was carried out by reviewing the hospital electronic medical record from 2014 to 2018. The adherence to drug treatment was measured 6 months after its initiation, and the numerical values of the metabolic studies were compared. Wilcoxon tests were performed to compare the difference before and after treatment. Results: Ninety patients were evaluated, with 73.3% of adherence. The 180-day overall adherence rate was 61.2% in patients treated with a single drug and 85.4% in patients treated with multiple drugs. There is a statistically significant increase in citrate levels in patients with good adherence in comparison with non-adherent patients (p=0.031 vs. p=0.528). Conclusions: Medical treatment and dietary measures in patients with kidney stones have an initial impact at 6 months on the values of the main urinary metabolic alterations that predispose to calculi formation; the most significant is seen in those patients with adherence to medical treatment for hypocitraturia.
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Received: 09 November 2019
Available online: 06 August 2020
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Corresponding Authors:
Braulio Omar Manzo
E-mail: bmanzo@urocem.com
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Characteristics | Patients | Percentage (%) | Gender, n | Male | 50 | 55.6 | Female | 40 | 44.4 | Age (year) | 45.4 (13.2)a | | DM2, n | 8 | 8.9 | HTN, n | 25 | 27.8 | BMI (kg/m2) | 28.8 (4.3)a | | Normal, n | 17 | 18.9 | Overweight, n | 42 | 46.7 | Grade I Obesity, n | 30 | 33.3 | Grade II Obesity, n | 1 | 1.1 | Stone volume (mm2) | 252 (124-447.3)b | | Number of Stones, n | 2 (1-3)b | | Urinary Metabolic Disorders, n | 189 | | Hypocitraturia | 78 | 41.26 | Hyperoxaluria | 53 | 28.04 | Hypercalciuria | 31 | 16.40 | Hyperuricosuria | 27 | 14.28 |
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Baseline and demographic characteristics.
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Metabolic disorder | Before, mean (range) | After, mean (range) | p-Value | Hypocitraturia (n=78) | Urinary pH | 6 (5-7) | 6 (5.5-6.75) | 0.473 | 24 h urine Cit (mg/d) | 62 (20.5-208) | 189 (40-274) | 0.015* | 24 h volume (mL) | 1900 (1485-2585) | 2210 (1600-2740) | 0.561 | Hyperuricosuria (n=27) | Urinary pH | 6 (5.5-6.7) | 6 (5.5-6.8) | 0.606 | 24 h urine UA (g/d) | 0.8 (0.5-10) | 0.7 (0.5-0.9) | 0.021* | 24 h volume (mL) | 2100 (1780-2800) | 2145 (1500-2970) | 0.764 | Hypercalciuria (n=31) | Urinary pH | 6 (5.3-6.5) | 6 (5.8-6.5) | 0.425 | 24 h urine Ca (mg/d) | 302.4 (172.2-367.4) | 261.8 (208-342) | 0.854 | 24 h volume (mL) | 2200 (1720-2970) | 2360 (1700-2920) | 0.984 | Hyperoxaluria (n=53) | 24 h urine Ox (mmol/d) | 0.6 (0.5-0.8) | 0.6 (0.5-0.8) | 0.906 | 24 h volume (mL) | 2390 (1845-2950) | 2440 (1800-2965) | 0.468 |
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Differences between the first metabolic study and its control 6 months after the start of medical treatment.
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Metabolic alteration | Variable | Before, mean (range) | After, mean (range) | p-Value | Hypocitraturia (n=78) | 24 h Cit (mg/d) | 60 (18-191.5) | 141.5 (29.2-274) | 0.031* | Hyperuricosuria (n=27) | 24 h UA (g/d) | 0.8 (0.4-22.6) | 0.6 (0.4-0.9) | 0.088 | Hypercalciuria (n=31) | 24 h Ca (mg/d) | 297.5 (167.7-366.9) | 261.8 (191.7-342.0) | 0.889 | Hyperoxaluria (n=53) | 24 h Ox (mmol/d) | 0.6 (0.5-0.8) | 0.6 (0.4-0.7) | 0.286 |
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Changes showed in the 24-hour urine parameters in patients with adherence to medical and dietary treatment.
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Metabolic alteration | Variable | Before, mean (range) | After, mean (range) | p-Value | Hypocitraturia (n=78) | 24 h Cit (mg/d) | 130 (32-322) | 248.5 (80.7-281.5) | 0.528 | Hyperuricosuria (n=27) | 24 h UA (g/d) | 0.8 (0.6-5.9) | 0.7 (0.6-4.9) | 0.327 | Hypercalciuria (n=31) | 24 h Ca (mg/d) | 305.1 (226.1-305.1) | 228.7 (213.2-228.7) | 0.655 | Hyperoxaluria (n=53) | 24 h Ox (mmol/d) | 0.4 (0.3-0.7) | 0.6 (0.5-0.8) | 0.374 |
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Changes showed in the 24-hour urine parameters in patients with no adherence to medical and dietary treatment.
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