JMIR Publications

ABSTRACT

Background:

Covid-19 vaccinations were first met with public hesitancy. there are some debates about the magnitude of vaccines effectiveness in reducing hospital admissions or length of stay.

Objective:

To compare the effectiveness of different vaccines regarding hospital admissions and length of stay.

Methods:

Data related to hospital admissions, length of stay, the need for intensive care and vaccination data were obtained from the Jordanian Ministry of Health.

Results:

A total of 17182 hospital admissions were recorded from 02-02-2021, the earliest date a vaccinated individual who has passed the 20-day mark on the first dose was admitted with relation to Covid-19, to 15-08-2021. The mean age admitted was 53 years. from all those who were admitted the unvaccinated group was the majority in both overall admissions (93.7% with the length of stay of 6.9 days for older groups and 8.3 days for the younger) and ICU admissions for both the older and younger group-ages ( 91.23% and 93.3% respectively) followed by fully vaccinated (3.4% with the length of stay by vaccine type: Pfizer 4.9-6.1 with 115 admissions; AstraZeneca 10.8-5.1 with 26 admissions; Sinopharm 5.3-6.7 with 440 admissions; Sputnik 2-4 with 4 admissions ) and those with only the first dose (2.5% with the length of stay by vaccine type: Pfizer 7.05-7.25 with 133 admissions; AstraZeneca 7.73-7.53with 109 admissions; Sinopharm 6.5-7.9 with 253 admissions; Sputnik =4 with 1 admission). The time between the vaccination and admission was noticeably longer after the second dose of each vaccine compared to only the first dose with the exception of AstraZeneca (Pfizer 35.4-35.73 to 46.8-79.85; AstraZeneca 48.3-50.7 to 33.4-43.4; Sinopharm 22.65-24.86 to 54-62.9; Sputnik 28 to 99.5-101.5).

Conclusions:

The study showed a lower admission and shorter stay at the hospital for those who are vaccinated, indicating the ability of vaccines to reduce the burden on the healthcare system.