Timeliness of contact tracing among flight passengers during the COVID-19 epidemic in Vietnam

BMC Infectious Diseases

Table 1 Time interval of contact tracing of passengers on 22 flights arriving Vietnam from 6 March to 21 March by methods of index case detection

Time	Total (n = 22) Median (IQR)	Method of index case detection Median (IQR)		p-value^a
Time	Total (n = 22) Median (IQR)	Self-presentation (n = 9)	Mandatory testing (n = 13)	p-value^a
Interval I	1 (1–2)	1 (1–2)	2 (1–2)	0.34
Interval II	3 (2–5)	5 (4–7)	2 (2–3)	0.005
Total time	4.5 (4–6)	7 (5–8)	4 (3–5)	0.018

Note: Interval I is defined as time intervals between date of index case confirmation to date of contact tracing initiation; Interval II is time intervals between date of contact tracing initiation to completion; Total time = Interval I + Interval II
^aInterval I, Interval II, and Total time by method of index case detection were compared using Wilcoxon rank-sum tests

ISSN: 1471-2334