Trefond: Effet d’un traitement par hydroxychloroquine prescrit comme traitement de fond de rhumatismes inflammatoires chroniques ou maladies auto-immunes systémiques sur les tests diagnostiques et l’évolution de l’infection à SARS CoV-2: étude de 871 patients

Trefond, 262 patient HCQ prophylaxis study: 17% higher mortality [p=0.8], 78% higher combined mortality/ICU admission [p=0.21], and 45% higher hospitalization [p=0.12] https://c19p.org/trefond

copied to clipboard

Effet d’un traitement par hydroxychloroquine prescrit comme traitement de fond de rhumatismes inflammatoires chroniques ou maladies auto-immunes systémiques sur les tests diagnostiques et l’évolution de l’infection à SARS CoV-2: étude de 871 patients

Trefond et al., Revue du Rhumatisme, doi:10.1016/j.rhum.2021.09.004 (date from earlier preprint)

27 Jan 2021 Source PDF Share Tweet

Retrospective 71 chronic HCQ patients compared with 191 matched controls, analyzing only those with a highly suspected or confirmed diagnosis of COVID-19. No significant difference was found in outcomes, however matching failed with extreme confounding - 77.5% of HCQ patients with systemic autoimmune diseases vs. 21.5% of control patients.

Other research shows that the risk of COVID-19 for systemic autoimmune disease patients is much higher overall, Ferri et al. show OR 4.42, p<0.001 [Ferri].

1. Ferri at al., Clinical Rheumatology, doi:0.1007/s10067-020-05334-7, COVID-19 and rheumatic autoimmune systemic diseases: report of a large Italian patients series, https://link.springer.com/article/10.1007/s10067-020-05334-7.

Important missing comments or errors? Let us know.

risk of death, 16.6% higher, RR 1.17, p = 0.80, treatment 4 of 68 (5.9%), control 12 of 183 (6.6%), adjusted per study, odds ratio converted to relative risk.

risk of death/ICU, 78.2% higher, RR 1.78, p = 0.21, treatment 8 of 71 (11.3%), control 18 of 191 (9.4%), adjusted per study, odds ratio converted to relative risk.

risk of hospitalization, 44.9% higher, RR 1.45, p = 0.12, treatment 24 of 71 (33.8%), control 53 of 191 (27.7%), adjusted per study, odds ratio converted to relative risk.

Effect extraction follows pre-specified rules prioritizing more serious outcomes. Submit updates

This study is excluded in the after exclusion results of meta analysis: not fully adjusting for the different baseline risk of systemic autoimmune patients, significant unadjusted confounding possible, excessive unadjusted differences between groups.

Trefond et al., 27 Jan 2021, retrospective, France, peer-reviewed, 21 authors.

All Studies Meta Analysis Submit Updates or Corrections

This Paper HCQ All

Please send us corrections, updates, or comments. Vaccines and treatments are complementary. All practical, effective, and safe means should be used based on risk/benefit analysis. No treatment, vaccine, or intervention is 100% available and effective for all current and future variants. We do not provide medical advice. Before taking any medication, consult a qualified physician who can provide personalized advice and details of risks and benefits based on your medical history and situation. FLCCC and WCH provide treatment protocols.

Submit