Author: Zhong, Qingyang; Peng, Jie
Title: Mean platelet volume/platelet count ratio predicts severe pneumonia of COVIDâ€19 Cord-id: r512538v Document date: 2020_10_31
ID: r512538v
Snippet: BACKGROUND: Although platelet mean volume/platelet count ratio (MPR) is considered to be a crucial marker of inflammatory and infectious diseases, the relationship between MPR and novel coronavirus infectious disease 2019 (COVIDâ€19) remains unclear. METHODS: In this retrospective study, 85 patients with confirmed COVIDâ€19 were enrolled and divided into low and high MPR group. Data from repeated measures were compared by the generalized estimating equations. Cox regression analyses were perfo
Document: BACKGROUND: Although platelet mean volume/platelet count ratio (MPR) is considered to be a crucial marker of inflammatory and infectious diseases, the relationship between MPR and novel coronavirus infectious disease 2019 (COVIDâ€19) remains unclear. METHODS: In this retrospective study, 85 patients with confirmed COVIDâ€19 were enrolled and divided into low and high MPR group. Data from repeated measures were compared by the generalized estimating equations. Cox regression analyses were performed to assess the impact of MPR on the incidence of severe pneumonia (SP), with inverse probability of treatment weighting (IPTW) used to reduce confounding bias. The primary outcome is the incidence of SP of COVIDâ€19. RESULTS: During followâ€up, 17 (20.0%) patients were developed to SP. Compared with mild patients, patients with SP developed showed a higher MPR level at baseline, day 1, day 2, and day 3 after admission (P = .005, P = .015, P = .009, and P = .032, respectively). Kaplanâ€Meier method showed a higher incidence of SP in the high MPR group than the low MPR group (logâ€rank test = 10.66, P = .001). After adjustment, high MPR was associated with an elevated incidence of SP (HR, 5.841, 95% CI, 1.566â€21.791, P = .009). The IPTW method also suggested that MPR was a significant factor related to the incidence of SP (HR, 8.337, 95% CI, 4.045â€17.182, P < .001). CONCLUSION: High MPR level is an independent risk factor for severe pneumonia in patients with COVIDâ€19.
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