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Table 4 Characteristics of the psoriatic patients among the three classes

From: Identifying the Zheng in psoriatic patients based on latent class analysis of traditional Chinese medicine symptoms and signs

Variable Class 1 (n = 178) Class 2 (n = 176) Class 3 (n = 153) P value*
  Dampness-heat Zheng Blood heat Zheng Yin deficiency and blood dryness Zheng  
Gender     
 Male 97 (54.5) 129 (73.3) 70 (45.8) < 0.01
 Female 81 (45.5) 47 (26.7) 83 (54.2)  
Seasons     
 Spring 28 (15.7) 41 (23.3) 40 (26.1) 0.045**
 Summer 36 (20.2) 32 (18.2) 29 (18.9)  
 Autumn 39 (22.0) 35 (19.9) 41 (26.8)  
 Winter 75 (41.1) 68 (38.6) 43 (28.1)  
Age, Median (IQR) 34.5 (24.2, 47.3) 39.9 (28, 53.6) 32.2 (22.4, 40.7) < 0.001
Ethnicity     
 Han 165 (92.7) 159 (90.3) 137 (89.5) 0.667
 Others 13 (7.3) 17 (9.7) 16 (10.5)  
Type of patient     
 In-patient 47 (26.4) 33 (18.8) 5 (3.3) < 0.001
 Out-patient 131 (77.6) 143 (81.2) 148 (96.7)  
Smoking     
 Yes 49 (27.6) 79 (44.9) 34 (22.2) < 0.001
 No 129 (72.4) 97 (55.1) 119 (77.8)  
Drinking     
 Yes 33 (18.5) 65 (36.9) 35 (22.9) 0.003
 No 145 (81.5) 111 (63.1) 118 (77.1)  
Associated diseases     
 Hypertension 15 (8.4) 19 (10.8) 7 (4.6) 0.065
 Gastrointestinal disease 8 (4.5) 17 (9.7) 20 (13.1) 0.074
 Diabetes mellitus 7 (3.9) 6 (3.4) 4 (2.6) 0.610
  1. *Chi square test.
  2. **Kruskal Wallis test.
  3. IQR, inter-quartile range.