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Table 5 Mean differences between and within groups of included studies

From: Effectiveness of dry needling and injections of myofascial trigger points associated with plantar heel pain: a systematic review

Trial

Difference between groups

Differences within groups

Tillu and

Gupta

(1998)

N/A (one group only)

(i) VAS pain:

   @ 4 weeks (34.7% improvement, p < 0.001)

   @ 6 weeks (67.9% improvement, p < 0.001)

   @ 6 weeks vs 4 weeks, (difference 33.2%, p = 0.047)

  

(ii) Verbal pain score (% of improvement):

40.2 (40.1%) @ 4 weeks and 65.9 (32.8%) @ 6 weeks

  
   

Intervention

Control

Imamura et

al. (1998)

Duration of treatment

(weeks): Significantly

less in intervention

group (83.9% difference

between the groups,

p < 0.05)

(i) Mean duration of treatment in weeks (SD)

(ii) VAS pain:

   @ discharge

   @ 6 months

   @ 2 years

3.4 (2.2)

58.4% improvement,

p = 0.003

67.1% improvement,

p = 0.007

67.1% improvement

p = 0.002

21.1 (19.5)

54.9% improvement, p < 0.05

values not reported at 6 months

values not reported at 12 months

  

(iii) PPT (gastrocnemius):

   @ discharge

   @ 6 months

   @ 2 years

130% increase, p = 0.001

71% increase, p = 0.009

55% increase, p = 0.023

PPT not reported for control

  

(iv) PPT (medial calcaneal tubercle) at:

   @ discharge

   @ 6 months

   @ 2 years

106% increase, p = 0.004

values not reported at 6

   months

143% increase, p = 0.007

PPT not reported for control

Perez-Millan

and Foster

(2001)

N/A (one group only)

(i) VAS pain:

   @ 6 weeks (46% improvement, p < 0.001)

  

(ii) Foot function index questionnaire scores*:

   significantly less pain for 10 out of 12

  
  1. Key: N/A: Not applicable; VAS = visual analogue scale; MTrP = Myofascial trigger point; PPT = Pressure pain threshold; *The foot function index questionnaire used in this trial was not validated