Normal urinary protein is <150mg in 24 hours.
Causes of proteinuria include:
Transient proteinuria:
- UTI
- Fever
- Heavy exercise
- Pregnancy
Persistent proteinuria
- Glomerulonephritis
- Diabetes mellitus
- Amyloidosis
- Myeloma
- Hypertension
- Connective tissue diseases
- Vasculitis
- Congestive cardiac failure
Small print gem: orthostatic proteinuria is proteinuria that occurs after standing for a prolonged period and is not present in early morning urine. It is rare in people older than 30 but occurs in up to 5% of adolescents.
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