Introduction
Methods
Question | Response options |
---|---|
Has a doctor diagnosed you with psoriasis? | Yes, No |
Has a doctor diagnosed you with psoriatic arthritis? | Yes, No |
How old are you? | Under 18, 18–25, 26–30, 31–35, 36–40, 41–45, 46–50, 51–55, 56–60, 61–65, Over 65 |
What is your sex? | Male, Female |
How tall are you? | Under 4.5 ft, 4.5 ft–5 ft, Over 5 ft–5.5 ft, Over 5.5 ft–6 ft, Over 6 ft–6.5 ft, Over 6.5 ft |
How much do you weigh? | Under 100 lbs, 100–120 lbs, 121–140 lbs, 141–160 lbs, 161–180 lbs, 181–200 lbs, 201–220 lbs, 221–240 lbs, 241–260 lbs, 261–280 lbs, 281–300 lbs, 301–320 lbs, 321–340 lbs, 341–360 lbs, 361–380 lbs, 381–400 lbs, Over 400 lbs |
Do you have one or more of the following conditions? | Crohn’s disease, Juvenile-onset diabetes (type 1), Rheumatoid arthritis, Lupus, Eczema, Cutaneous T cell lymphoma, Celiac disease, Sjogren’s syndrome, Uveitis, Thyroid disease, Multiple sclerosis, Alopecia areata, Atopic dermatitis, High cholesterol, High triglycerides, High blood pressure, Coronary artery disease, Stroke, Adult-onset diabetes (type 2), Parkinson’s disease, Liver disease, Cancer, Sleep apnea, Fatty liver disease |
How much of your body is covered by psoriasis? | None or very little (body surface area, BSA < 5%), Only a few patches that could be covered by 1 or 2 palms of your hand (BSA < 5%), Could be covered by less than 5 palms of your hand (BSA < 5%), Between 5 and 10 palms of your hand (BSA 5–10%), Scattered patches (BSA 5–10%), Covered by more than 10 palms of your hand (BSA > 10%), Extensive psoriasis (BSA > 10%) |
At what age did a doctor diagnose you with psoriasis? | I have never been diagnosed with psoriasis by a doctor, Under 18, 18–25, 26–30, 31–35, 36–40, 41–45, 46–50, 51–55, 56–60, 61–65, Over 65 |
At what age did a doctor diagnose you with psoriatic arthritis? | I have never been diagnosed with psoriatic arthritis by a doctor, Under 18, 18–25, 26–30, 31–35, 36–40, 41–45, 46–50, 51–55, 56–60, 61–65, Over 65 |
How many cigarettes do you smoke per day? | I don’t smoke, I only smoke occasionally, 1–10 cigarettes, 11–20 cigarettes, More than 20 cigarettes |
How many alcoholic drinks do you have per week? (one drink is 12 oz beer, 5 oz wine, 1 oz of liquor) | I don’t drink alcohol, 1–3, 4–6, 7–9, 10 or more |
At what time of day do you experience the most itch? | Morning, Midday, Afternoon, Evening, Night |
Do you have trouble sleeping at night? | Yes, No |
How many hours of sleep do you get per day on average? | Under 5 h, 5 h, 6 h, 7 h, 8 h, 9 h, 10 or more hours |
Characteristic | Frequency (%) |
---|---|
Disease | |
Psoriasis | 1588 (50.9) |
Psoriasis with psoriatic arthritis | 1530 (49.1) |
Age | |
18–20 | 142 (4.6) |
21–30 | 248 (8.0) |
31–40 | 559 (17.9) |
41–50 | 696 (22.3) |
51–60 | 806 (25.8) |
61–70 | 653 (20.9) |
71–80 | 8 (0.3) |
81–90 | 5 (0.2) |
91–99 | 1 (0.1) |
Gender | |
Male | 960 (30.8) |
Female | 2153 (69.1) |
No response | 5 (0.1) |
Body mass index (BMI) | |
Underweight (< 18.5) | 137 (4.4) |
Normal (18.5–24.9) | 1021 (32.8) |
Overweight (25–29.9) | 875 (28.1) |
Obese (≥ 30) | 1085 (34.8) |
Comorbid sleep apnea | |
Absent | 2735 (87.7) |
Present | 383 (12.3) |
Psoriasis severity | |
Mild (< 5% body surface area) | 1328 (45.1) |
Moderate (5–10% body surface area) | 1053 (35.8) |
Severe (> 10% body surface area) | 564 (19.2) |
Disease duration | |
Psoriatic skin disease | |
0–10 years | 613 (19.7) |
> 10 years | 2505 (80.3) |
Psoriatic arthritis | |
0–10 years | 466 (30.5) |
> 10 years | 1064 (69.5) |
Smoking status | |
Non-smoker | 2416 (80.3) |
Smoker | 594 (19.7) |
Alcohol consumption | |
Low-risk | 2710 (89.7) |
High-risk | 311 (10.3) |
Timing of Worst Itch | Frequency (%) |
---|---|
Do not notice a difference | 202 (6.5) |
Morning | 363 (11.6) |
Midday | 307 (9.8) |
Afternoon | 349 (11.1) |
Evening | 1048 (33.7) |
Night | 863 (27.6) |
Sleep characteristics | Frequency (%) |
---|---|
Sleep quality | |
No trouble sleeping | 1213 (41.6) |
Trouble sleeping | 1704 (58.4) |
Sleep quantity | |
Less than 7 h per day | 1166 (38.8) |
7 h or more per day | 1836 (61.2) |
Variable | OR | 95% CI | p value |
---|---|---|---|
Sleep difficultya | |||
Disease | |||
Psoriasis without psoriatic arthritis | – | – | – |
Psoriasis with psoriatic arthritis | 2.15 | 1.79–2.58 | < 0.001* |
Age | 0.99 | 0.93–1.04 | 0.671 |
Gender | |||
Male | – | – | – |
Female | 2.03 | 1.67–2.46 | < 0.001* |
BMI | |||
Normal BMI | – | – | – |
Underweight (< 18.5) | 0.81 | 0.53–1.24 | 0.331 |
Overweight (25–29.9) | 1.08 | 0.86–1.36 | 0.493 |
Obese (≥ 30) | 1.25 | 1.00–1.56 | 0.047* |
Comorbid sleep apnea | 1.41 | 1.07–1.86 | 0.016* |
Psoriasis severity | |||
Mild | – | – | – |
Moderate | 1.59 | 1.30–1.94 | < 0.001* |
Severe | 2.40 | 1.87–3.08 | < 0.001* |
Timing of worst itch | |||
No difference | – | – | – |
Morning | 1.26 | 0.62–2.56 | 0.521 |
Midday | 1.19 | 0.58–2.43 | 0.641 |
Afternoon | 1.30 | 0.64–2.66 | 0.468 |
Evening | 1.18 | 0.60–2.33 | 0.630 |
Night | 1.34 | 0.68–2.65 | 0.403 |
Smoker | 1.60 | 1.26–2.02 | < 0.001* |
High-risk alcohol consumption | 0.79 | 0.59–1.05 | 0.105 |
Sleep quantityb | |||
Disease | |||
Psoriasis without psoriatic arthritis | – | – | – |
Psoriasis with psoriatic arthritis | 1.08 | 0.91–1.29 | 0.371 |
Age | 1.01 | 0.96–1.07 | 0.663 |
Gender | |||
Male | – | – | – |
Female | 1.16 | 0.95–1.40 | 0.138 |
BMI | |||
Normal BMI | – | – | – |
Underweight (< 18.5) | 1.15 | 0.75–1.76 | 0.527 |
Overweight (25–29.9) | 1.09 | 0.86–1.38 | 0.475 |
Obese (≥ 30) | 1.62 | 1.29–2.03 | < 0.001* |
Comorbid sleep apnea | 1.30 | 1.01–1.68 | 0.044* |
Psoriasis severity | |||
Mild | – | – | – |
Moderate | 1.41 | 1.16–1.72 | 0.001* |
Severe | 1.40 | 1.11–1.76 | 0.004* |
Timing of worst itch | |||
No difference | – | – | – |
Morning | 0.81 | 0.40–1.63 | 0.553 |
Midday | 0.96 | 0.47–1.93 | 0.900 |
Afternoon | 0.91 | 0.45–1.84 | 0.797 |
Evening | 0.98 | 0.50–1.90 | 0.943 |
Night | 0.84 | 0.43–1.65 | 0.618 |
Smoker | 1.62 | 1.31–2.00 | < 0.001* |
High-risk alcohol consumption | 1.34 | 0.70–2.58 | 0.372 |