Kaiser Permanent (Kp) Mid-Atlantic States (Mas) Experience with Covid Related Hospital Admissions in Adult Patients with Myositis

ABSTRACT

Background. Myositis is a group of rare systemic disease and may be treated with immunosuppressives which increase the risk for poor outcome with the COVID19 pandemic. Patients with this condition may have higher rates of admission to the hospital. Methods. KP is a health insurance plan and provides care to about 800 thousand people (including Medicare and Medicaid population) in Maryland, District of Columbia and Northern Virginia. As part of quality improvements, we randomly looked at 40 patients from our larger cohort with myositis who are diagnosed and followed by a board-certified rheumatologist. We noted hospitalizations and Covid infection from March 1, 2020 to December 31, 2021. Results. Of the 40 patients, 29 (72%) were female and 11 were male. 19 (47%) were Blacks, 18 whites (including 6 Latino), and 3 Asians. Age ranged from 25 to 80 years with a mean age of 59.6 years. 25 (62%) patients had Dermatomyositis, 14 had polymyositis and 1 was IBM. The mean age at diagnosis was 55.9 years (range 23-80 years). 12 (30%) had myositis specific antibodies (4 Jo-1, 4 Mi-2, 1 PL 7, 1 PL 12, 1 PL7 plus PL12, 1 TIF Gamma). 22 (55%) were negative. Six did not have antibody testing. During this time, 11 (27.5%) were admitted to the hospital, 2 patients tested positive for COVID 19. One tested positive in the hospital and was asymptomatic. The other person was admitted for symptomatic COVID 19 infection. Other reasons for admission were cardiac, pulmonary (noncovid 19 related), infections, Gastrointestinal issues (including GI bleeding). One admission was for accidental bleach ingestion, and one for psychiatric admission. Of these 40 patients, 38 (95%) patients have received the COVID vaccinations, one patient refused, and for one person we do not have any record of vaccination. Conclusion. The admission rates to the hospital do appear to be higher for this group of patients with myositis, as is generally postulated. However, the reasons for admission were largely related to reasons other than COVID 19 infection and were related to general medical conditions.