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Table 3 Contact history and frequency of outdoor activities among participants 14 days before returning to Macao

From: Effectiveness of personal protective health behaviour against COVID-19

  Total (N = 1137) Non-infected (N = 1113) Infected (N = 24) P value
Contact history
 Went to any hospitals or clinics for any reason (Yes, %) 56/1137 (4.93%) 53/1113 (4.76%) 3/24 (12.5%) 0.110
 Went to hospitals or clinics for respiratory symptoms (Yes, %) 20/1137 (1.76%) 18/1113 (1.62%) 2/24 (8.33%) 0.064
 Had physical contact with anyone who had respiratory symptoms (Yes, %) 91/1137 (8%) 85/1113 (7.64%) 6/24 (25%) 0.002
  If yes, did you wear a mask during your contact (Yes, %) 58/91 (63.74%) 57/85 (67.06%) 1/6 (16.67%) 0.022
  If yes, did you wash your hands after your contact (Yes, %) 84/91 (92.31%) 81/85 (95.29%) 3/6 (50%) 0.005
 Had physical contact with suspected/confirmed COVID-19 patients (including family members) (Yes, %) 25/1137 (2.2%) 21/1113 (1.89%) 4/24 (16.67%) 0.001
  If yes, did you wear a mask during the contact (Yes, %) 13/25 (52%) 13/21 (61.9%) 0/4 (0%) 0.039
  If yes, did you wash your hands after your contact (Yes, %) 25/1137 (2.2%) 20/21 (95.24%) 2/4 (50%) 0.057
Frequency of outdoor activities
(Total number measured in a 14-day interval before returning to Macau)
 Went to workplace (mean ± std. deviation) 0.73 ± 2.41 0.7 ± 2.4 0.8 ± 2.6 0.833
 Went to school (mean ± std. deviation) 2.32 ± 3.7 2.3 ± 3.7 3.4 ± 5.1 0.291
 Went to crowded places, such as supermarkets, malls, and cinemas (mean ± std. deviation) 2.34 ± 2.43 2.3 ± 2.4 3.8 ± 4.6 0.142
 Took public transportation vehicles, such as bus, underground transit, train, and aircraft but excluding taxi (mean ± std. deviation) 2.52 ± 4.36 2.5 ± 4.3 4.5 ± 5.7 0.110
 Participated in high-risk gathering activities defined by interacting with people within 2 m without wearing a mask such as parties, bars, restaurants, family and friend gatherings (mean ± std. deviation) 0.82 ± 2.77 0.7 ± 2.3 5.4 ± 10.1 0.034