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. 2021 Feb 23;21:22. doi: 10.1186/s12873-021-00415-5

Table 5.

Number of calls total and per minute during phase 1 and 2

Number of calls Phase 1 Phase 2 Total
0 1101 1209 2310
1–2 1979 2328 4307
≥3 1240 783 2023
4320 4320 8640

Chi-squared = 136.57–2 degrees of free (P < 10−3)