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. 2020 Feb 12;95(2):187–193. doi: 10.1016/j.abd.2019.08.023

Table 2.

Comparison of demographic data and the presence of Demodex infestation between patients with acne vulgaris, rosacea, seborrheic dermatitis and controls

Acne vulgaris
(n = 43)
Rosacea
(n = 43)
Seborrheic dermatitis (n = 41) Control group
(n = 77)
p
Age (years) Min–Max (Median) 15–36 (26) 23 − 79 (37) 17–57 (28) 16–64 (31) χ2: 41.602
Mean ± SD 25.49 ± 5.95 40.70 ± 12.83 30.83 ± 9.09 32.90 ± 11.25 0.001a, c



Gender Female 35 (81.4%) 31 (72.1%) 16 (39.0%) 51 (66.2%) χ2: 18.287
Male 8 (18.6%) 12 (27.9%) 25 (61.0%) 26 (33.8%) 0.001b, c



Demodicosis No 31 (72.1%) 9 (20.9%) 21 (51.2%) 75 (97.4%) χ2: 78.183
Yes 12 (27.9%) 34 (79.1%) 20 (48.8%) 2 (2.6%) 0.001b, c
a

Kruskal Wallis Test.

b

Pearson Chi-Square test.

c

p < 0.01.