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Abstract Background/Aims The aim was to examine the course, impact of baseline predictors, and relationship with functional ability, of the six Scleroderma Health Assessment Questionnaire (SHAQ) visual analogue scales (VAS) over time in patients with SSc. Methods A retrospective analysis of patients attending annual review visits at a tertiary SSc center between 2005 and February 2020. Linear Mixed-effect models were used to assess longitudinal trajectories and effect of potential prognostic factors on the six different SHAQ VAS, except finger ulcers where the VAS scale was dichotomised (presence/absence) and analysed using a random intercept logistic regression model. To assess whether longitudinal changes in SHAQ VAS correlated with the HAQ-DI/11-point scleroderma functional index, we obtained the gradients of individual linear regression models, overall and by disease type. Results 537 patients (75% lcSSc) with at ≥ 2 available time-points were included. Mean follow-up time and number of review visits were 6.8 (SD = ±4.2) years 6.4 (SD = ±3.7) visits, respectively. The mean (SD) RP and disease duration (defined as the first non-RP symptom) were 7.6 (11.9) and 8.0 (8.2) years, respectively. Time-in-study (Table 1) was associated with increase in VAS intestinal (p = 0.004), overall disease (p = 0.001) and presence of ulcers (p = 0.013). There was a trend observed concerning RP VAS (p = 0.068) and VAS breathing (p = 0.074), and no difference with VAS pain (p = 0.183). Time since RP onset showed a significant negative association with VAS pain (b=-0.01, 95%CI= -0.01 to 0.00, p = 0.032). Age had a significant negative effect on intestinal VAS (b=-0.01 95%CI= -0.01 to -0.00, p = 0.040). Presence of ulcers increased with disease duration (OR = 0.97 95%Cl= 0.94 to 1.00, p = 0.026), and in those with diffuse disease (OR = 0.54 95%CI= 0.31 to 0.95, p = 0.033). For patients who were anti-RNP positive (compared to negative), the overall disease score VAS was higher (b = 0.23, 95%Cl= 0.00 to 0.45, p = 0.048) higher. All correlations between SHAQ VAS scales and function (HAQ-DI and 11-point scleroderma functional index) were positive (Table 2), and were almost exclusively stronger in patients with diffuse disease. Conclusion Longitudinal assessment of the SHAQ VAS scales provides important insights into disease trajectory. We have identified baseline factors associated with VAS outcomes, and associations with function over time. Disclosure M. Hughes: None. Y. Sylvestre: None. J. Manning: None. M. Mandzuk: None. M. Samaranayaka: None. G. Dinsdale: None. A. Herrick: None.
Hughes et al. (Mon,) studied this question.