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Hypophosphataemia in general practice patients
J M Guy1, M F Stewart, A Olukoga
1Department of Clinical Biochemistry, Salford Royal Hospitals NHS Trust, Hope Hospital, UK.
Annals of Clinical Biochemistry
|June 17, 1999
Summary
Hypophosphataemia, or low plasma phosphate, is more common in general practice and outpatient settings than previously thought. Many cases are unexplained, necessitating further investigation strategies.
Area of Science:
- Clinical Chemistry
- Internal Medicine
- General Practice
Background:
- Plasma phosphate levels are routinely measured in clinical practice.
- Previous understanding of hypophosphataemia prevalence in non-hospitalized patients is limited.
Purpose of the Study:
- To compare plasma phosphate concentrations across general practice, inpatient, and outpatient settings.
- To investigate the prevalence and causes of hypophosphataemia in these patient groups.
- To propose a strategy for managing unexplained hypophosphataemia.
Main Methods:
- A comparative analysis of plasma phosphate concentrations.
- Data collected over an 8-month period from general practice, hospital inpatients, and outpatients.
- Follow-up investigations for patients with severe hypophosphataemia (< or = 0.4 mmol/L).
Main Results:
- Plasma phosphate distributions were similar across all three groups.
- 12-16% of all results were at or below 0.8 mmol/L.
- In general practice, 8.3% of males and 12.1% of females had results below reference ranges.
- Severe hypophosphataemia (< or = 0.4 mmol/L) occurred in 0.2% of results.
- In most severe cases, hypophosphataemia was unexpected and unexplained upon follow-up.
Conclusions:
- Hypophosphataemia is more prevalent in general practice and outpatient settings than previously recognized.
- A significant proportion of severe hypophosphataemia cases lack an attributable cause.
- Further investigation strategies are needed for patients with unexplained hypophosphataemia.