Research Article
Validation of the 5-D Itch Scale in Three Ethnic Groups and Exploring Optimal Cutoff Values Using the Itch Numerical Rating Scale
Table 1
Descriptive statistics of three ethnic groups.
| | Variables | Asian () | Black/African () | Hispanic () | |
| Age
Mean (SD) | 37.0 (14.74) | 34.0 (14.5) | 33.1 (12.7) | — | Gender
(%) | | | Female | 700 (64.7) | 422 (66.4) | 400 (66.1) | 0.62 | | Male | 382 (35.3) | 214 (33.6) | 205 (33.9) | | History of mental disorders
(%) | | Yes | 134 (12.4) | 75 (11.8) | 130 (21.5) | 31.31 | | No | 948 (87.6) | 561 (88.2) | 475 (78.5) | | Presence of skin diseases
(%) | | Yes | 183 (16.9) | 84 (13.2) | 90 (14.9) | 4.31 | | No | 899 (51.3) | 552 (86.8) | 515 (85.1) | | Current skin diseases
(%) | | Acne | 14 (7.6) | 3 (3.6) | 10 (11.1) | 48.06 | | Atopic dermatitis | 95 (51.9) | 24 (28.6) | 30 (33.3) | | | Dryness | 17 (9.3) | 6 (7.1) | 11 (12.2) | | | Psoriasis | 4 (2.2) | 2 (2.4) | 5 (5.6) | | | HS | 1 (0.5) | 1 (1.2) | 1 (1.1) | | | Hives | 3 (1.6) | 1 (1.2) | 0 (0.0) | | | Rashes and fungus infection | 12 (6.6) | 2 (2.4) | 2 (2.2) | | | Lupus | 0 (0.0) | 2 (2.4) | 0 (0.0) | | | Others and unspecified | 37 (20.2) | 43 (51.2) | 31 (34.4) | | Presence of depression
(%) | | Yes | 334 (30.9) | 287 (45.1) | 309 (51.1) | 75.45 | | No | 748 (69.1) | 349 (54.9) | 296 (48.9) | | Presence of pruritus
(%) | | Yes | 261 (24.1) | 226 (35.5) | 182 (30.1) | 26.10 | | No | 821 (75.9) | 410 (64.5) | 423 (69.9) | | Presence of both depression and pruritus
(%) | | Yes | 138 (12.8) | 149 (23.4) | 129 (21.3) | 37.53 | | No | 944 (87.2) | 487 (76.6) | 476 (78.7) | | Presence of itch symptoms over 6 weeks
(%) | | Yes | 196 (18.1) | 107 (16.8) | 94 (15.5) | 1.86 | | No | 886 (81.9) | 529 (83.2) | 511 (84.5) | |
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