Skip to main content

Table 2 Patient characteristics

From: Psychometric validation and meaningful change thresholds of the Worst Itching Intensity Numerical Rating Scale for assessing itch in patients with chronic kidney disease-associated pruritus

Characteristic

Content validation cohort (N = 23)

Psychometric evaluation

Exit interview cohort (N = 70)

Phase 2 cohort (N = 174)

Pooled phase 3 cohort (N = 848)

Age (years)

 Mean (SD)

55.4 (17.0)

57.3 (12.5)

58.7 (12.9)

55.7 (12.1)

 Median [range]

61.0 [25.0–82.0]

59.0 [26.0–84.0]

59.0 [22.0–88.0]

57.0 [24.0–79.0]

Gender, n (%)

 Male

14 (60.9)

105 (60.3)

504 (59.4)

46 (65.7)

 Female

9 (39.1)

69 (39.7)

344 (40.6)

24 (34.3)

Race, n (%)

 White

10 (43.5)

62 (35.6)

515 (60.7)

42 (60.0)

 Black or African American

6 (26.1)

102 (58.6)

248 (29.2)

20 (28.6)

 Asian

1 (4.3)

4 (2.3)

45 (5.3)

3 (4.3)

 American Indian or Alaskan native

1 (4.3)

4 (2.3)

13 (1.5)

1 (1.4)

 Native Hawaiian or other Pacific Islander

0 (0.0)

1 (0.6)

10 (1.2)

2 (2.9)

 Other

8 (34.8)

0 (0.0)

14 (1.7)

2 (2.9)

 Not reported

0 (0.0)

1 (0.6)

3 (0.4)

0 (0.0)

Ethnicity, n (%)

 Not Hispanic or Latino

15 (65.2)

136 (78.2)

572 (67.5)

32 (45.7)

 Hispanic or Latino

8 (34.8)

36 (20.7)

268 (31.6)

38 (54.3)

 Not reported

0 (0.0)

2 (1.1)

8 (0.9)

0 (0.0)

Years on hemodialysis mean (SD)

5.4 (5.1)

5.8 (4.7)

4.8 (4.3)

3.3 (2.3)

Years with CKD-aP, mean (SD)

2.9 (3.0)

4.4 (4.1)

3.3 (3.7)

2.7 (2.1)

Baseline WI-NRS, n (%)

 ≥ 0 to < 4

3 (13.0)

 ≥ 4 to < 6

3 (13.0)

51 (29.3)

187 (22.1)

7 (10.0)

 ≥ 6 to < 8

11 (47.8)

81 (46.6)

384 (45.3)

34 (48.6)

 ≥ 8 to 10

6 (26.1)

42 (24.1)

277 (32.7)

29 (41.4)

  1. SD, Standard deviation