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. 2022 Nov 18;107:102328. doi: 10.1016/j.jairtraman.2022.102328

Table 1.

Sample size.

No. of observations Before COVID-19 After COVID-19 Total
Overall 327,606 73,243 400,849
Matched according to departing month, DOW, and time interval* 117,408 59,823 177,231
Matched according to departing week, DOW, and time interval* 71,004 52,002 123,006
Matched according to departing week, DOW, and hour 34,141 34,141 68,282

*Time interval refers to morning, lunch, evening, and night hours.