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To evaluate the effect of intra-articular corticosteroid injection (IACI) of depot preparation of betamethasone on the hypothalamic-pituitary-adrenal (HPA) axis, in patients with osteoarthritis of the knee
Consecutive patients attending the rheumatology or orthopedic clinic with osteoarthritic knee pain, not responding satisfactorily to medical or physical therapy were allocated to group-1 after consent and given IACI of 6 mg of betamethasone acetate/betamethasone sodium phosphate. Following completion of this part, consecutive age- and sex-matched patients were allocated to group-2 and given intra-articular injection of 60 mg of sodium hyaluronate. Just prior to the knee injection and 1, 2, 3, 4 and 8 weeks later, patients had 1 µg adrenocorticotropin hormone (ACTH) stimulation test. Secondary adrenal insufficiency (SAI) was defined as levels of less than 18 ng/ml or a rise of < than 7 ng/ml of serum cortisol, 30 minutes following the ACTH stimulation test.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| betamethasone | Patients who had intra-articular injection of betamethasone | ||
| Hyaluronic acid | Patients who had intra-articular injection of hyaluronic acid |
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| Measure | Description | Time Frame |
|---|---|---|
| Adrenal Suppression | Adrenal gland suupresion and inability to adequately secrete cortisol in response to stress | 2 months |
| Measure | Description | Time Frame |
|---|---|---|
| favorable clinical response | 2 months | |
| Favorable clinical response | Improvement of knee pain by more than 30 points according to visual analogue scale | 2 months following the steroid injection |
| Measure | Description | Time Frame |
|---|---|---|
| Nadir serum cortisol level | 2 months |
Inclusion Criteria:
Exclusion Criteria:
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Patients with osteoarthritis of the knee and had not been onsteroids for at least 3 months
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| Name | Affiliation | Role |
|---|---|---|
| George Habib, M.D. | Nazareth Hospital | Principal Investigator |
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