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Table 1 Demographic characteristics of study participants

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

Characteristics Controls NP+ve cases NP-ve cases
  n (%) n (%) n (%)
Sex       
  Male 250 (31.3) 154 (32.4) 136 (33.3)
  Female 549 (68.7) 321 (67.6) 273 (66.7)
Age (years)       
  20-29 41 (5.1) 24 (5.1) 31 (7.6)
  30-39 113 (14.1) 91 (19.2) 81 (19.8)
  40-49 263 (32.9) 157 (33.1) 124 (30.3)
  50-59 256 (32.0) 150 (31.6) 131 (32.0)
  ≥ 60 126 (15.8) 53 (11.2) 42 (10.3)
Ethnicity       
  White 791 (99.0) 432 (90.9) 394 (96.3)
  South Asian 1 (0.1) 24 (5.1) 8 (2.0)
  Other 7 (0.9) 19 (4.0) 7 (1.7)