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Table 1 Characteristics of included patients and lab-confirmed intervals

From: The lab-confirmed interval of COVID-19 clusters and its application in the strength evaluation of prevention and control measures

Characteristics Europe China outside Hubei
Infector Infectee Infector Infectee
Pairs 63 103
Age (years)
 Range 16–87 9–77 20–80 4–90
 Mean (SD) 45.8 (19.5) 40.9 (18.2) 49.2 (13.1) 47.5 (19.8)
 < 60, n (%) 36 (57.1) 26 (41.3) 79 (76.7) 65 (63.1)
 ≥ 60, n (%) 14 (22.2) 5 (7.9) 21 (20.4) 26 (25.2)
 Missing, n (%) 13 (20.6) 32 (50.8) 3 (2.9) 12 (11.7)
Sex
 Male, n (%) 51 (81.0) 12 (19.1) 50 (48.5) 52 (50.5)
 Female, n (%) 11 (17.5) 24 (38.1) 50 (48.5) 42 (40.8)
 Missing, n (%) 1 (1.5) 27 (42.9) 3 (2.9) 9 (8.7)
Lab-confirmed interval (days)
 Mean (SD) 2.6 (2.0) 2.6 (3.9)
 Min, Max -1, 10 −6, 19
 Median (P25, P75) 2 (1, 4) 2 (0, 4)
 P2.5, P97.5 1, 8 −3, 13
Lab-confirmed interval (days) age < 60
 Mean (SD) 2.4 (1.9) 2.3 (3.8)
 Min, Max −1, 8 −6, 19
 Median (P25, P75) 2 (1, 3.5) 1 (0, 3)
 P2.5, P97.5 −1, 8 −5, 13
Lab-confirmed interval (days) age ≥ 60
 Mean (SD) 2.9 (1.5) 3.8 (4.4)
 Min, Max 1, 6 −2, 13
 Median (P25, P75) 3 (2, 4) 2 (1, 5)
 P2.5, P97.5 1, 6 −2, 13