Author Of 2 Presentations
P0417 - Utilization, safety, and tolerability of ocrelizumab: year 3 data from the Providence Ocrelizumab Registry (ID 475)
Ocrelizumab (OCR), a humanized anti-CD20 monoclonal antibody, was approved in the US in 2017 for the treatment of relapsing MS (RMS) and primary progressive MS (PPMS). The Providence OCR Registry (POR) was established to monitor long-term treatment and safety outcomes.
To evaluate OCR treatment outcomes including clinical and radiographic changes as well as safety issues using real-world data from a diverse, community-based MS population.
Adult MS patients who have been prescribed OCR were eligible. Chart reviews at OCR start date and every 6 months thereafter were done by a trained RN. Expanded Disability Status Scale (EDSS) scores were determined by the treating provider on the start date and then yearly. Descriptive statistics and paired t-tests were used.
Of the 355 patients enrolled from March 2017 to March 2020, 71.9% were female; mean (SD) age was 51.8 (12.5) years; 78.3% had RMS, 13.2% had SPMS, and 8.5% had PPMS. Median baseline EDSS [interquartile range (IQR)] was 3.0 [2.0, 4.0], 6.5 [6.0, 7.5], and 6.5 [6.0, 7.0] respectively. The RMS cohort had an annualized relapse rate (ARR) of 0.34 prior to starting OCR. Among all patients who had > 1 dose of OCR (n=332), ARR was 0.09 with 4 patients having 2 relapses and 1 patient having 3 relapses. Median EDSS scores at 12 months were 3.0 [2.0, 5.5] (n=151) for RMS patients, 6.5 [6.5, 7.5] (n=31) for SPMS, and 6.5 [5.6, 7.5] (n=16) for PPMS. Infusion reactions occurred in 32.9% of patients during dose one, becoming less frequent with subsequent doses. Respiratory infections occurred in 40.1% of patients followed by urinary tract infections (UTI) (33.1%). Of 34 patients hospitalized, 11 patients had multiple hospitalizations. 25 hospitalizations were due to infections, 14 (56%) of which were due to UTIs. Sixty-five percent of these patients were 55 years or older. Forty-three (12.0%) patients have stopped OCR with a median time to discontinuation [IQR] of 10.8 [6.1,18.9] months; 24 patients stopped due to side effects, 15 patients stopped due to a relapse or clinical progression, and four patients died one each due to septic shock from pneumonia, urosepsis, suicide, and respiratory distress. There were no significant changes in Beck Depression Inventory (BDI), but 87 patients who had baseline and 12 month Modified Fatigue Inventory (MFIS), had significant improvement at 12 months (mean difference -3.7 (±14.1), (p=0.02).
Our study showed that OCR was effective in controlling relapse and disability worsening and reported similar rates of infusion reactions compared to earlier phase III clinical trials. Although only a small percentage of patients have stopped OCR, infections resulting in hospitalization are a concern, especially in older patients.
P1087 - Characterizing GI events in early versus recent dimethyl fumarate cohorts at two large MS centers. (ID 928)
The management of GI symptoms associated with the initiation of DMF has evolved over time with real world experience. The combined effect of GI management strategies has not been assessed in randomized studies and their overall impact on the incidence of GI symptoms and therapy discontinuation due to GI events is currently unclear.
To compare discontinuation rate due to gastrointestinal (GI) symptoms in the first year after initiating dimethyl fumarate (DMF) between an early (post launch) and recent DMF cohort of multiple sclerosis (MS) patients at two MS centers.
Data were collected through chart reviews at Rocky Mountain MS Center and Providence MS Center. The cutoff for Early versus Recent cohort was April 1, 2014. Chi-square, non-parametric, and t-tests were used to determine differences between the two cohorts. Differences in discontinuation due to a GI event for the two cohorts were compared with a Cox proportional hazards model adjusted for baseline characteristics.
Medical records of 700 patients who initiated DMF between March 2013 and December 2017 were reviewed- 302 were Early and 398 Recent. At baseline, Early patients were older (50.30 vs 48.50, p=0.049), had longer disease duration [11.09 (IQR: 7.88, 16.77) vs 6.72 (4.35, 13.72), p<0.001], more history of GI disease (27.8% vs. 22.1%, p=0.099) but lower percent of seasonal allergy (17.9 vs. 24.4, p=0.048). Discontinuation for any reason was higher in Recent patients (37.4% vs. 22.2%, p<0.001). Discontinuation due to GI symptom were 8.6% in the Early patients and 12.1% in the Recent patients (p=0.178). Females [HR: 2.27 (1.12-4.60)] and patients with a history of GI condition [HR: 2.14, (1.32-3.47)] were more likely to discontinue. No significant associations were found between discontinuation and any GI events or previous exposure to natalizumab or other medications. None of the baseline or patient characteristics were found to be risk factor of GI events except study site.
Overall, the discontinuation rate due to GI symptoms was no different between the Early and Recent patient cohorts. However, the odds of having a GI symptom at the Rocky Mountain site were higher although discontinuation for this site was lower suggesting there may be differences in symptom reporting, data abstraction, and GI mitigation strategies between the two centers. Further research with prospective study design and standard documentation and data abstraction tool are needed.