Trends of interventional radiology procedures during the COVID-19 pandemic: the first 27 weeks in the eye of the storm

Insights into Imaging

Table 1 (2020 and 2019: IR procedures classified based on IR-PAS classification)

		Frequencies				Mann–Whitney test
		Median	SD	Variance	Range	Mann–Whitney U	Standardized test statistic	Asymptotic sig. (2-sided test)
Total	2020	133.00	22.175	491.739	93 (74–167)	288.000	− 1.705	0.088
Total	2019	142.50	27.075	733.073	137 (25–162)	288.000	− 1.705	0.088
Tier 1	2020	27.00	6.299	39.676	23 (14–37)	419.000	0.443	0.658
Tier 1	2019	26.00	6.142	37.729	31 (8–39)	419.000	0.443	0.658
Tier 2	2020	57.00	12.556	157.656	49 (26–75)	301.000	− 1.492	0.136
Tier 2	2019	64.50	13.492	182.025	64 (15–79)	301.000	− 1.492	0.136
Tier 3	2020	48.00	8.871	78.698	35 (29–64)	293.000	− 1.624	0.104
Tier 3	2019	53.00	10.423	108.639	45 (25–70)	293.000	− 1.624	0.104

Weekly records of all IR procedures during the COVID-19 pandemic (period specified) and pre-pandemic (2019), classified based on the IR-PAS classification. Evaluation of differences in median weekly caseload across all IR-PAS tiers between the two time periods. No statistically significant differences are noted in the weekly median number of IR procedures performed across all IR-PAS tiers between the two time periods
*p < 0.05