Table 1.
Baseline characteristics of patients with psoriatic arthritis (PsA) with delay in diagnosis of 2 or less years compared to more than 2 years
| ≤2yr (n=73) | >2yr (n=89) | Total (n=162) | p value | |
|---|---|---|---|---|
| Years from PsA symptom onset to Physician/Rheumatologist diagnosis of PsA, median (IQR) | 0.5 (0.2–1.0) | 6.5 (3.5–10.1) | 2.5 (0.5–7.3) | -- |
| Age (yrs) at PsA symptom onset, mean (SD) | 44.0 (12.4) | 39.5 (12.4) | 41.5 (12.6) | 0.041 |
| Sex, female (%) | 36 (49%) | 39 (44%) | 75 (46%) | 0.48 |
| Education Level | 0.79 | |||
| High school or less | 16 (22%) | 16 (18%) | 32 (20%) | |
| Some college or 2yr degree | 27 (38%) | 36 (40%) | 63 (39%) | |
| ≥4 yr college degree | 29 (40%) | 37 (42%) | 66 (41%) | |
| Missing | 1 | 0 | 1 | |
| Race | 0.018 | |||
| Black | 2 (3%) | 2 (2%) | 4 (2%) | |
| Asian | 0 (0%) | 8 (9%) | 8 (5%) | |
| Hispanic | 6 (8%) | 3 (3%) | 9 (6%) | |
| Other/Mixed | 1 (1%) | 0 (0%) | 1 (1%) | |
| White | 64 (88%) | 75 (85%) | 139 (86%) | |
| Unknown | 0 | 1 | 1 | |
| BMI (kg/m2) at PsA diagnosis, mean (SD) | 29.5 (6.1) | 32.2 (7.7) | 31.0 (7.1) | 0.028 |
| Missing | 4 | 5 | 9 | |
| Smoking at PsA diagnosis | 0.53 | |||
| Current smoker | 12 (16%) | 15 (17%) | 27 (17%) | |
| Past smoker | 23 (32%) | 35 (39%) | 58 (36%) | |
| Never smoker | 38 (52%) | 39 (44%) | 77 (48%) | |
| Alcohol intake at PsA dx | 56 (77%) | 65 (73%) | 121 (75%) | 0.59 |
| Psoriasis (Current or personal history) | 0.15 | |||
| No psoriasis | 2 (3%) | 5 (6%) | 7 (4%) | |
| Current psoriasis | 70 (96%) | 78 (88%) | 148 (91%) | |
| Personal history of psoriasis | 1 (1%) | 6 (7%) | 7 (4%) | |
| Family history of psoriasis | 24 (40%) | 35 (49%) | 59 (45%) | 0.32 |
| Missing | 13 | 17 | 30 | |
| Estmated age (yrs) at onset of psoriasis symptom, mean (SD) | 34 (14) | 34 (15) | 34 (14) | 0.85 |
| Missing | 2 | 5 | 7 | |
| Psoriasis Severity at first diagnosis | 0.25 | |||
| Mild (< 2% BSA) | 38 (54%) | 34 (41%) | 72 (47%) | |
| Moderate (2–10% BSA) | 20 (28%) | 33 (40%) | 53 (34%) | |
| Severe (>10% BSA) | 13 (18%) | 16 (19%) | 29 (19%) | |
| No Documentation/Missing | 2 | 6 | 8 | |
| Type of psoriasis at first dx | 0.033 | |||
| Chronic plaque psoriasis | 56 (80%) | 74 (88%) | 130 (84%) | |
| Guttate psoriasis | 3 (4%) | 1 (1%) | 4 (3%) | |
| Pustular psoriasis- Generalized | 1 (1%) | 0 (0%) | 1 (1%) | |
| Pustular psoriasis- palms/soles | 2 (3%) | 4 (5%) | 6 (4%) | |
| Sebo-psoriasis | 5 (7%) | 0 (0%) | 5 (3%) | |
| Chronic plaque psoriasis & Guttate psoriasis | 0 (0%) | 3 (4%) | 3 (2%) | |
| Chronic plaque & Pustular psoriasis-palms/soles | 1 (1%) | 0 (0%) | 1 (1%) | |
| Chronic plaque & Sebo-psoriasis | 2 (3%) | 2 (2%) | 4 (3%) | |
| No Documentation/Missing | 3 | 5 | 8 | |
| Site of psoriatic lesions at first diagnosis of psoriasis | 0.65 | |||
| Palms and/or soles | 1 (5%) | 3 (15%) | 4 (10%) | |
| Elbows and/or knees | 3 (14%) | 4 (20%) | 7 (17%) | |
| Limbs arms and/or legs | 5 (23%) | 5 (25%) | 10 (24%) | |
| Trunk | 0 (0%) | 1 (5%) | 1 (2%) | |
| Face | 1 (5%) | 0 (0%) | 1 (2%) | |
| Scalp | 9 (41%) | 7 (35%) | 16 (38%) | |
| Intergluteal/Perianal | 2 (9%) | 0 (0%) | 2 (5%) | |
| Genital | 1 (5%) | 0 (0%) | 1 (2%) | |
| Missing | 51 | 69 | 120 | |
| Nail involvement at first diagnosis of psoriasis | 24 (42%) | 23 (35%) | 47 (38%) | 0.41 |
| No documentation | 16 | 23 | 39 | |
| Family history of PsA | 6 (12%) | 6 (11%) | 12 (11%) | 0.84 |
| Missing | 22 | 32 | 54 | |
| Enthesitis at or prior to PsA diagnosis | 16 (22%) | 35 (39%) | 51 (31%) | 0.018 |
| Dactylitis at or prior to PsA diagnosis | 35 (48%) | 35 (39%) | 70 (43%) | 0.27 |
| Inflammatory back pain at or prior to PsA diagnosis | 4 (5%) | 13 (15%) | 17 (10%) | 0.059 |
| Uveitis | 4 (5%) | 3 (3%) | 7 (4%) | 0.70 |
| Inflammatory bowel disease | 0 (0%) | 0 (0%) | 0 (0%) | -- |
| ESR (mm/hr) at PsA diagnosis, mean (SD) | 18.9 (18.3) | 18.2 (15.3) | 18.5 (16.8) | 0.95 |
| Missing | 4 | 17 | 21 | |
| CRP (mg/L) at PsA diagnosis, mean (SD) | 16.5 (32.4) | 13.6 (19.0) | 14.9 (26.0) | 0.87 |
| Missing | 22 | 29 | 51 | |
| Radiographic damage | 17 (24%) | 31 (35%) | 48 (30%) | 0.12 |
| Missing | 1 | 0 | 1 |