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Table 3 Unadjusted and adjusted incidence rate ratios for overall admissions among pre-lockdown and during-lockdown periods at the Puerto Rico Trauma Hospital, with corresponding 95% confidence intervals

From: The effect of the lockdown executive order during the COVID-19 pandemic in recent trauma admissions in Puerto Rico

Overall trauma admissions IRR (95% CI) Adjusted IRRa (95% CI)
Lockdown 0.47 (0.38–0.57) 0.41 (0.31–0.54)
Pre-Lockdown (2017–2019) 1 1
Lockdown 0.43 (0.36–0.52) 0.37 (0.27–0.50)
Pre-Lockdown (2019) 1 1
Lockdown 0.46 (0.38–0.56) 0.41 (0.30–0.55)
Pre-Lockdown (2018) 1 1
Lockdown 0.51 (0.42–0.62) 0.43 (0.32–0.58)
Pre-Lockdown (2017) 1 1
  1. Four regression models were built using different reference groups in each one: total admissions during 2017–2019 (mean), 2019, 2018, and 2017
  2. IRR incidence rate ratio, CI confidence interval
  3. aadjusted for sex, age, mechanisms of injury, and injury severity score