Randomised controlled trial of single, subacromial injection of methylprednisolone in patients with persistent, post-traumatic impingment of the shoulder.

OBJECTIVE To evaluate the impact on recovery, of single subacromial injection of methylprednisolone in patients with persistent, post-traumatic impingement of the shoulder. DESIGN Randomised, controlled study. SETTING Large accident and emergency department in Leicester, UK. PARTICIPANTS 98 patients with persistent, post-traumatic impingement of the shoulder. INTERVENTION Single subacromial injection of methylprednisolone with bupivicaine (group S, n=54) or bupivicaine only (group C, n=44). MAIN OUTCOME MEASURES Pain using a 10 cm visual analogue scale (VAS) and active shoulder abduction. RESULTS Comparison of pain scores by the 10 cm VAS between group and group C showed no statistical difference at 3, 6, or 12 weeks. Mean patient pain scores at 12 weeks were 1.38 in both groups (p=0.99). There were 16 patients in group S (mean age 52 years) with a 10 cm VAS greater than 1 (95% CI CI 0.17 to 0.43), compared with 13 patients (mean age 57 years) in group C (95% CI 0.17 to 0.45). Comparison of active shoulder abduction between group S and group C showed no statistical difference at 3, 6, or 12 weeks. Mean active abduction at 12 weeks was 168.9 degrees in group S and 170.3 degrees in group C (p=0.8). There were 10 patients in group S (mean age 60.5) with active abduction less than 170 at 12 weeks (95% CI 0.09 to 0.31), compared with five patients (mean age 62 years) in group C (95% CI 0.04 to 0.24). CONCLUSIONS Single subacromial injection of methylprednisolone has no beneficial impact on reducing the pain, or the duration of immobility in patients with persistent post-traumatic impingement of the shoulder