Weight Conversion

Pounds kg




Height Conversion

Inches cm

Calculation Tool

This calculator is for educational purposes and for user feedback. It should not be used for patient care. Contact mavric@nottingham.ac.uk for any feedback. The mailbox is monitored intermittently. Do not send personal details.

Please answer the questions below to calculate the risk of stopping leflunomide due to blood-test abnormalities in the next 5 years.

Name/ID:
Questionnaire:
1.
Age or Date of Birth
Age:
Date of Birth:
Y:
M:
D:
2.
Sex
3.
Weight (kg)
4.
Height (cm)
5.
Current Smoker
6.
Seronegative Spondyloarthritis
7.
Polymyalgia Rheumatica/Giant Cell Arteritis
8.
Rheumatoid arthritis
9.
Diabetes mellitus
10.
Chronic kidney disease stage 3
11.
Statins
12.
Methotrexate or Aminosalicylates
13.
Paracetamol
14.
Carbamazepine or Valproate
15.
Previous Abnormal Blood Tests
16.
Alcohol Use

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Footnotes

For the clinical risk factors a yes or no response is asked for. If the field is left blank, then a "no" response is assumed.
For Questions 6 to 8, if multiple conditions are diagnosed, please select only the one listed first.


Age The age of the patient
Sex Male or female. Enter as appropriate.
Weight This should be entered in kg.
Height This should be entered in cm.
Low Alcohol Use Between 1 and 14 units per week.
Moderate Alcohol Use Between 15 and 21 units per week.
Hazardous Alcohol Use More than 21 units per week.
Inflammatory condition Enter yes where the patient has a confirmed diagnosis of rheumatoid arthritis. Otherwise enter no (see also notes on risk factors).
Chronic kidney disease stage 3 Patients with chronic kidney disease stage 4 or 5 were excluded and the model should not be applied to them
Drugs If currently prescribed.
Current smoking Enter yes or no depending on whether the patient currently smokes tobacco.
Blood test abnormality in 6 months of primary care prescription Defined as neutrophil count <2x109/l or total leucocyte count <4x109/l, or platelet count <150x109/l or raised transaminase (ALT and/or AST >35 IU/l)
Seronegative Spondyloarthritis Includes ankylosing spondylitis, psoriatic arthritis, or reactive arthritis