Natale G De Santo

University of Campania "Luigi Vanvitelli"

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Massimo Círillo

University of Salerno

Pietro Anastasio

University of Campania "Luigi Vanvitelli"

Alessandra F. Perna

University of Campania "Luigi Vanvitelli"

M. Mellone

University of Naples Federico II

Daniela Molino

Santobono Children's Hospital

Rosa Maria Pollastro

University of Campania "Luigi Vanvitelli"

Rosa Maria De Santo

Istituto storico italiano per il Medio Evo

Biagio Di Iorio

D Chiricone

University of Campania "Luigi Vanvitelli"

Joseph Sepe

University of Minnesota Medical Center

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University of Naples Federico II

University of Campania "Luigi Vanvitelli"

Instituto de Filosofía

Consejo Superior de Investigaciones Científicas

University of Salerno

University of Messina

Mario Negri Institute for Pharmacological Research

Istituti di Ricovero e Cura a Carattere Scientifico

University of Bari Aldo Moro

Sapienza University of Rome

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Can overnight urine replace 24-hour urine collection to measure urinary calcium in epidemiologic studies?

PubMed (1993)

Massimo Círillo M. Mellone Natale G De Santo

The present study investigated whether overnight urine collection can replace 24-hour urine collection to measure urinary calcium (Ca) excretion in healthy individuals. One hundred healthy men (age 25-74 years) on their usual diet participated in the present study as part of an ongoing epidemiological population-based survey. Two separate bags (daytime and overnight bags) were given together with instructions to collect a complete 24-hour urine sample divided in to the daytime and the overnight specimen. Urinary Ca was analyzed by atomic absorption spectrophotometry and creatinine by the picric acid colorimetric method. Overnight urinary Ca was correlated to daytime (r = 0.618, p < 0.0001) and 24-hour urinary Ca (r = 0.891, p < 0.0001). In the 17 men found to have hypercalciuria (24-hour urinary Ca > or = 7.5 mmol), the overnight urinary Ca averaged 4.44 +/- 0.29 mmol/12 h (mean +/- SEM, range 2.35-6.38 mmol/12 h), indicating that an overnight urinary Ca of < 2.35 mmol/12 h (< 60% of the overnight urinary Ca distribution) ruled out the possibility of finding hypercalciuria in 24-hour urine. Fourteen of the seventeen hypercalciuric men had overnight urinary Ca in the upper 20% of the distribution (> or = 3.25 mmol/12 h). Hypercalciuria was found in 14 of the 19 men (73.7%) with an overnight urinary Ca of > or = 3.25 mmol/12 h, but only in 3 of the 81 men (3.7%) with an overnight urinary Ca of < 3.25 mmol/12 h.(ABSTRACT TRUNCATED AT 250 WORDS)

Urinary calcium

Urine collection device

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Unusual cases of chronic intoxication by vitamin D.

PubMed (2004)

D Chiricone Natale G De Santo Massimo Círillo

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Citations (23)

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