Retrospective 313 patients, mostly critical stage and mostly requiring respiratory support, showing unadjusted RR 1.06,
p = 0.77. Confounding by indication likely.
Rodriguez-Nava et al., 11/5/2020, retrospective, USA, North America, peer-reviewed, median age 68.0, 8 authors.
risk of death, 6.3% higher, RR 1.06, p = 0.77, treatment 22 of 65 (33.8%), control 79 of 248 (31.9%), unadjusted.