Table 4.
Incidence rate (IR) per 100 patient-years and related 95% confidence intervals (95% CI) calculated or extracted from every cohort study whenever possible and stratified according to source of incident or prevalent PsO
| Author, year | N events | Person-years | IR [95% CI] |
|---|---|---|---|
| Population-based | |||
| Wilson, 2009 | 57 | 20,936 | 0.27 [0.21–0.35] |
| Love, 2012 | 976 | 368,302 | 0.27 [0.25–0.28] |
| Lewinson, 2017 | 1466 | 374,579.7 | 0.39 [0.37–0.41] |
| Nguyen, 2017 | 4569 | 1,978,228 | 0.23 [0.22–0.24] |
| Thorarensen, 2017 | 1010 | 425,120 | 0.24 [0.22–0.25] |
| Green, 2020 | 1409 | 521,826 | 0.27 [0.26–0.28] |
| Psoriasis Registry | |||
| Eder, 2016 | 51 | 1880.9 | 2.7 [2.1–3.6] |
| Eder, 2017 | 57 | 1562.1 | 3.7 [2.8–4.7] |
| Outpatients | |||
| Abji, 2016 | 52 | 1922 | 2.7 [2.0–3.5] |
| Faustini, 2016a | 12 | 49.2 | 24.4 [12.6–42.6] |
| Elnady, 2019 | 9 | 208 | 4.3 [2.0–8.2] |
| Zabotti, 2019a | 6 | 120.4 | 4.9 [1.8–10.8] |
| Simon, 2020a | 24 | 273.6 | 9.7 [6.2–14.5] |
aStudies including PsO patients with arthralgia (i.e., prodromal PsA). The IRs subdivided for the presence of arthralgia were as follows: Faustini, 2016: PsO without arthralgia = IR 17.4 [5.6–40.5]; PsO with arthralgia = IR 34.3 [13.8–70.7]; Zabotti, 2019: PsO without arthralgia = IR 1.34 [0.0–7.5]; PsO with arthralgia = IR 10.9 [3.5–25.4]; Simon, 2020: PsO without arthralgia = IR 5.9 [2.4–12.2]; PsO with arthralgia = IR 12.5 [6.2–22.4]