The impact of COVID-19: variations in volumes and characteristics of retina surgeries

BMC Surgery

Table 2 Number and urgency of retina surgeries

	Feb 17–March 15 2020	March 16–April 12 2020	p-value* During COVID v. prior	March 16–April 12 2019	March 16–April 12 2018	p-value* During COVID v. 2019 v. 2018
Total number of unique patient encounters	2314	747	–	1872	1719	–
Total number of surgical procedure (% of total visits)	87 (3.76%)	34 (4.55%)	0.4559	62 (3.31%)	69 (4.01%)	0.2744
Number of emergent^† surgical procedure (% of total surgical procedures)	23 (26.44%)	18 (52.94%)	0.0056**	21 (33.87%)	15 (21.74%)	0.0063**
Number of urgent^‡ surgical procedure (% of total surgical procedures)	26 (28.89%)	4 (11.76%)	0.0380**	14 (22.58%)	21 (30.34%)	0.1075

^†Emergent procedures were defined as those that occurred within 7 days or fewer of surgical case order placement
^‡Urgent procedures were defined as those that occurred between 8 and 21 days of surgical case order placement
*The p-value is calculated by chi-square or Fisher’s exact test for categorical covariates of the 2020 data
**Statistical significance at α < 0.05

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