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Table 1 Demographic characteristics of female subjects at baseline for the 9- and 12-beam lasercomb trials

From: Efficacy and Safety of a Low-level Laser Device in the Treatment of Male and Female Pattern Hair Loss: A Multicenter, Randomized, Sham Device-controlled, Double-blind Study

  Trial #1 (n = 65) Trial #2 (n = 57)
9-beam lasercomb Sham p value 12-beam lasercomb Sham p value
Number of subjects 43 22   39 18  
Age (years)    0.8261    0.9102
 Mean age (SD) 49.3 (9.1) 49.8 (7.3)   48.7 (10.2) 49.1 (8.3)  
 Median age 52 49   50 49  
 Range 29–60 37–60   26–61 33–60  
Race, n (%)    1.0000    1.0000
 Caucasian 39 (90.7 %) 20 (90.9 %)   37 (94.9 %) 18 (100.0 %)  
 African American 1 (2.3 %) 0 (0 %)   1 (2.6 %) 0 (0 %)  
 Native American 0 (0 %) 0 (0 %)   0 (0 %) 0 (0 %)  
 Alaska Native 0 (0 %) 0 (0 %)   0 (0 %) 0 (0 %)  
 Asia/Pacific Islander 2 (4.7 %) 1 (4.5 %)   1 (2.6 %) 0 (0 %)  
 Other 1 (2.3 %) 1 (4.5 %)   0 (0 %) 0 (0 %)  
Ethnicity, n (%)    0.2773    1.0000
 Hispanic or Latino 13 (30.2 %) 10 (45.5 %)   10 (25.6 %) 4 (22.2 %)  
 Not Hispanic or Latino 30 (69.8 %) 12 (54.5 %)   29 (74.4 %) 14 (77.8 %)  
Ludwig/Savin classification, n (%)    0.6513    0.2926
 I-4 12 (27.9 %) 3 (13.6 %)   21 (53.8 %) 6 (33.3 %)  
 II-1 11 (25.6 %) 7 (31.8 %)   11 (28.2 %) 6 (33.3 %)  
 II-2 15 (34.9 %) 9 (40.9 %)   6 (15.4 %) 4 (22.2 %)  
 Frontal 5 (11.6 %) 3 (13.6 %)   1 (2.6 %) 2 (11.1 %)  
Fitzpatrick skin type, n (%)    1.0000    0.7606
 I 0 (0 %) 0 (0 %)   2 (5.1 %) 0 (0 %)  
 II 15 (34.9 %) 7 (31.8 %)   11 (28.2 %) 4 (22.2 %)  
 III 20 (46.5 %) 11 (50.0 %)   14 (35.9 %) 9 (50.0 %)  
 IV 8 (18.6 %) 4 (18.2 %)   12 (30.8 %) 5 (27.8 %)  
Mean baseline hair counta (SD) 162.6 (46.2) 155.7 (43.5)   142.2 (40.5) 168.4 (41.1)  
  1. aNumber of terminal hairs per cm2 in the target area
  2. SD standard deviation