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Table 2 Symptoms in cases with and without neurophysiological abnormality

From: Differences in risk factors for neurophysiologically confirmed carpal tunnel syndrome and illness with similar symptoms but normal median nerve function: a case–control study

  NP+ve cases NP-ve cases
  n (%) n (%)
Days in past 4 weeks with numbness, tingling or pain in hand(s)     
  <7 21 (4.4) 28 (6.9)
  7-13 49 (10.3) 53 (13.0)
  14-28 354 (74.5) 277 (67.7)
  Missing 51 (10.7) 51 (12.5)
Days in past 4 weeks on which numbness, tingling or pain in hand(s) disturbed sleep     
  0 55 (11.6) 102 (24.9)
  <7 89 (18.7) 77 (18.8)
  7-13 83 (17.5) 78 (19.1)
  14-28 213 (44.8) 128 (31.3)
  Missing 35 (7.4) 24 (5.9)
Time since completely free from numbness, tingling and pain in hands for ≥ 4 weeks     
  <6 months 161 (33.9) 164 (40.1)
  ≥ 6 months, <1 year 41 (8.6) 29 (7.1)
  ≥1 Year 254 (53.5) 196 (47.9)
  Missing 19 (4.0) 20 (4.9)
Problems in past 4 weeks because of numbness, tingling or pain in hand(s)     
  Difficulty turning taps, using kitchen   gadgets, sewing or doing repairs 106 (22.4) 90 (22.0)
  Having minor accidents   (e.g. dropping things) 54 (11.4) 66 (16.1)
  Difficulty fastening buttons or zips 57 (12.0) 54 (13.2)
  Trouble writing or typing 70 (14.7) 62 (15.2)
  Being very clumsy 54 (11.4) 52 (12.7)
Pain at other anatomical sites in the past 4 weeks     
  Neck 221 (46.5) 218 (53.3)
  Shoulder 214 (45.1) 217 (53.1)
  Elbow 185 (39.0) 166 (40.6)