SAPS

The goal of this cross-sectional study is to estimate the prevalence of the nociplastic pain phenotype, according to the IASP clinical criteria, among patients diagnosed with SubAcromial Pain Syndrome (SAPS). The main question it aims to answer is: What is the prevalence of the nociplastic pain phenotype in patients diagnosed with SAPS in an outpatient clinic? Primary outcome: Proportion of patients with SAPS meeting the IASP criteria for nociplastic pain.

The goal of this prospective cohort study is to investigate whether pain phenotype is associated with subsequent change in pain intensity after corticosteroid injection given as part of routine care in patients diagnosed with SAPS. The main question it aims to answer is: Does change in shoulder pain from baseline to 4 weeks after corticosteroid injection differ between patients classified as having a nociplastic pain phenotype and those classified as having a non-nociplastic pain phenotype?