Table 2.

Types of Outpatient Clinic Visits During 4 Phases of the COVID-19 Pandemic in the Neurosurgical Subspecialties

Subspecialty	Type of Visit	Phase 0 12/31/2018–12/23/2019	Phase 1 12/30/2019–3/9/2020	Phase 2 3/16/2020–4/27/2020	Phase 3 5/4/2020–11/2/2020	P Value Phase 0 to Phase 1	P Value Phase 0 to Phase 2	P Value Phase 0 to Phase 3	P Value Phase 2 to Phase 3
Spine	Phone	0% ± 0%	0% ± 0%	0.2% ± 0.6%	1.4% ± 1.4%	<0.05	<0.05	<0.05	<0.05
	Video	0% ± 0%	0% ± 0%	67.9% ± 30.5%	30.3% ± 13.1%
	In-person	100% ± 0%	100% ± 0%	31.9% ± 30.5%	68.4% ± 14%
Tumor	Phone	0% ± 0%	0% ± 0%	1.8% ± 1.9%	2.3% ± 1.2%	<0.05	<0.05	<0.05	<0.05
	Video	0% ± 0%	0% ± 0%	60.7% ± 26.9%	48.3% ± 6.7%
	In-person	100% ± 0%	100% ± 0%	37.5% ± 27.8%	49.5% ± 6.2%
Vascular	Phone	0% ± 0%	0% ± 0%	0% ± 0%	0% ± 0%	<0.05	<0.05	<0.05	<0.05
	Video	0% ± 0%	0% ± 0%	30.4% ± 20.3%	23.7% ± 13.6%
	In-person	100% ± 0%	100% ± 0%	69.6% ± 20.3%	76.3% ± 13.6%
Pain	Phone	0% ± 0%	0% ± 0%	0% ± 0%	0.3% ± 1.1%	<0.05	<0.05	<0.05	<0.05
	Video	0% ± 0%	0% ± 0%	85.7% ± 37.8%	53.7% ± 24.4%
	In-person	100% ± 0%	100% ± 0%	14.3% ± 37.8%	46% ± 24.3%
Functional	Phone	0% ± 0%	0% ± 0%	0% ± 0%	0.4% ± 1.2%	<0.05	<0.05	<0.05	<0.05
	Video	0% ± 0%	0% ± 0%	10.7% ± 19.7%	14.7% ± 12.8%
	In-person	100% ± 0%	100% ± 0%	89.3% ± 19.7%	84.8% ± 12.7%
Peripheral Nerve	Phone	0% ± 0%	0% ± 0%	0% ± 0%	0.4% ± 1.6%	<0.05	<0.05	<0.05	<0.05
	Video	0% ± 0%	0% ± 0%	14.7% ± 19.7%	17.7% ± 14%
	In-person	100% ± 0%	100% ± 0%	85.3% ± 19.7%	81.8% ± 14.4%
Trauma	Phone	0% ± 0%	0% ± 0%	0% ± 0%	0.3% ± 1.7%	<0.05	<0.05	<0.05	<0.05
	Video	0% ± 0%	0% ± 0%	64.3% ± 47.6%	60.9% ± 30.5%
	In-person	100% ± 0%	100% ± 0%	35.7% ± 47.6%	35.1% ± 28.9%
Total	Phone	0% ± 0%	0% ± 0%	0.8% ± 0.9%	1.4% ± 0.5%	<0.05	<0.05	<0.05	<0.05
	Video	0% ± 0%	0% ± 0%	60.3% ± 27%	37.4% ± 7%
	In-person	100% ± 0%	100% ± 0%	38.9% ± 27.4%	61.3% ± 7.2%