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Table 2 Distribution of gender, number of examined hairs, scored scale structure and deformation variables

From: Hair shaft structures in EDAR induced ectodermal dysplasia

  Reference group Non-mutation group Mutation group
n = 32 n = 20 n = 17a
Women, n (%) 17 (53.1 %) 10 (50.0 %) 9 (56.3 %)
Examined hairs, mean (sd) 9.5 (2.2) 10.2 (2.0) 9.6 (2.3)
Scale structure of cuticle layer    
 1. Normal 23 12 8
 2. Incipient loss of structure 2 1 1
 3. Almost no structure 3 2 2
 4. Smooth surface 3 5 1
 5. Erosions 1 0 3
 6. Reinforced scale structure 0 0 1
Diameter (Min/Max) μm 40/110 15/110 20/90
Variation in diameter μm    
 1. No variation 0 0 1
 2. Continuous variation of the same size 31 17 14
 3. Large local variation 1 3 1
Deformation grade    
 1. None 7 2 0
 2. Superficial (no obvious grooves present) 24 15 4
 3. Deep (obvious grooves present) 1 3 12
Deformation extent    
 1. None 7 2 0
 2. Patchy 8 13 6
 3. Large surface areas 17 5 10
Twisted hair 0 0 2
Baldness 0 0 1
  1. aOne subject bald and consequently not included in hair analysis