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Table 3 Comparison of plantar fascia hyperaemia classifications for PHP and control groups as measured by power Doppler ultrasound (hyperaemia graded from 1 to 4)

From: Medical imaging for plantar heel pain: a systematic review and meta-analysis

Study Group Grade 1 Grade 2 Grade 3 Grade 4
   Count (%) Count (%) Count (%) Count (%)
McMillan et al., 2013 [35] PHP group (n = 30) 22 (73) 5 (17) 2 (7) 1 (3)
  Control group (n = 30) 28 (93) 2 (7) 0 (0) 0 (0)
Walther et al., 2004 [41] PHP group (n = 20) 10 (50) 2 (10) 5 (25) 3 (15)
  Control group (n = 20) 19 (95) 1 (5) 0 (0) 0 (0)
  1. Grading scale: 1 represented normal tissue perfusion, 2 mild hyperaemia, 3 moderate hyperaemia, and 4 marked hyperaemia with a confluent surrounding vascular blush