Skip to main content

Advertisement

Table 6 Characteristics of included trials of pulsed electromagnetic fields for pain relief in patients with knee osteoarthritis

From: Short-term efficacy of physical interventions in osteoarthritic knee pain. A systematic review and meta-analysis of randomised placebo-controlled trials

First author, publication year Intervention type, treatment sessions and period No of patients on active therapy (n = 255) Method quality Mean baseline pain (mm VAS) Best mean difference (95% CI) of change over placebo (mm VAS) Outcome assessment timepoints (weeks, best time point in bold)
Callaghan-05 SWT, 3 sessions/week, 6 sessions total, output 20 W in 20 minutes, 400 Hz, treatment dose 24 kJ 9 5 65.0 15.0 (-12.7 to 42.7) 2
Jacobson – 01 PEMF, 8 sessions, 1–8 Hz, 3 × 10-7G 101 3 63.3 7.9 (0.8 to 15.4) 2, 4
Nicolakis-02 PEMF 30 min daily, 6 weeks, 40 mT 1–3000 Hz 15 4 34.6 10.8 (-3.5 to 25.1) 6
Pipitone-01 PEMF 30 min daily, 6 weeks, 3–20 Hz, <0.5 Gauss 34 5 - 2.0 (-5.8 to 9.7) 6
Thamsborg-05 PEMF, 2 h daily for 6 weeks, 10 mV, 50 Hz 42 5 52.6 0.3 (-7.7 to 7.9) 2, 6, 12
Trock-93 PEMF, 15 Gauss, <30 Hz, 30 min 3–5 times/week, total 18 sessions 14 4 76.5 31.0 (11.0 to 51.0) 2,4, 8
Trock-94 PEMF, 15 Gauss, <30 Hz, 30 min 3–5 times/week, total 18 sessions 40 5 70.7 14.6 (0.9 to 28.3) 2, 4, 8
Best within 4 weeks   209    6.9† (2.2 to 11.6)  
6 weeks   91    1.0 (-4.1 to 6.0)  
8 weeks   47    19.8 (7.1 to 32.5)  
12 weeks   42    -2.4 (-10.1 to 5.3)  
Pooled 6–12 weeks   180    4.8 (-2.2 to 11.8)  
Total   255 4.4* 63.7†   3.2*
  1. *Mean † Weighted mean