Table 1

Clinical indicators of PSA disease manifestation

1Tender jointsFor each of the 78 joints based on the presence or absence of tenderness
2Swollen jointsFor each of the 76 joints based on the presence or absence of swelling
3EnthesitisFor each of the six LEI entheseal sites based on presence or absence
4DactylitisFor each of the 10 fingers and 10 toes based on presence or absence
5mNAPSIFor each of the 10 fingers defined as clear, mild, mild-to-moderate, moderate-to-severe, severe for a mNAPSI of 0, 1, 2, 3–4, 5–13
6PASIFor each of the four body areas (upper limbs, lower limbs, head and trunk) erythema, scaling and thickening were defined as clear, mild, mild-to-moderate, moderate-to-severe or severe on a scale from 0 to 4. The affected body areas were rescaled from a 0–6 scale onto the same scale of 0–4 (0 (clear), 1 (mild), 2 (mild-to-moderate), 3–4 (moderate-to-severe), 4–6 (severe))
  • LEI, Leeds Enthesitis Index; mNAPSI, modified nail psoriasis severity index; PASI, psoriasis area severity index; PsA, psoriatic arthritis.