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Table 2 Baseline characteristics of the patients by severity of CTS

From: Predictors of the patient-centered outcomes of surgical carpal tunnel release – a prospective cohort study

  Total:
n (%)*
Normal/mild:
n (%)*
Moderate:
n (%)*
Severe:
n (%)*
P valuea
  N = 71 N = 15 N = 28 N = 25  
Age
 Median (interquartile range) 50.5 years (40–60) 49 years (31–53) 48 years (38.5 –57) 56.5 years (49.5 –67.5) 0.01
Sex      <0.001
 Female 45 (63.4) 12 (80) 24 (85.7) 8 (32)  
 Male 26 (36.6) 3 (20) 4 (14.3) 17 (68)  
Smoking status      0.6
 Non-smoker 35 (50) 7 (46.7) 12 (44.4) 14 (56)  
 Current smoker 21 (30) 5 (33.3) 11 (40.7) 5 (20)  
 Former smoker 14 (20) 3 (20) 4 (14.8) 6 (24)  
Education      0.44
 Lowb 55 (83.3) 10 (76.9) 24 (92.3) 18 (75)  
 Intermediatec 9 (13.7) 2 (15.4) 2 (7.7) 5 (20.8)  
 Highd 2 (3.0) 1 (7.7) 0 (0) 1 (4.2)  
Job type (Latko scale)      0.33
 Non-repetitive (1–7 points on Latko scale) 24 (53.3) 8 (72.7) 9 (52.9) 7 (43.8)  
 Repetitive (8–10 points on Latko scale) 21 (46.7) 3 (27.3) 8 (47.1) 9 (56.3)  
Body mass index
 Median (interquartile range) 28.3 (24.3–32.0) 23.9 (22.0–31.7) 27.4 (23.5–29.0) 29.4 (28.4–35.6) 0.006
WHO-Five well-being index
 Median (interquartile range) 56 (32–64) 42 (32–60) 56 (32–64) 56 (40–76) 0.28
Handedness      0.53
 Right-handed 65 (94.2) 15 (100) 24 (92.3) 23 (92)  
 Left- or mixed-handed 4 (5.8) 0 (0) 2 (7.7) 2 (8)  
  1. *Differences to total N due to missing values
  2. aChi-squared test for categorical variables and Kruskal-Wallis test for continuous variables
  3. bLow level of vocational or secondary education (less than 12 years of school education and/or completed apprenticeship)
  4. cIntermediate level of vocational or secondary education (at least 12 years of school education and/or degree of a specialized vocational school)
  5. dUniversity training (Bachelor’s and higher academic level)