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Table 2 Univariate and multivariable analysis of factors influencing the use and the visual correct position of facemask fit

From: How do the general population behave with facemasks to prevent COVID-19 in the community? A multi-site observational study

Factors Facemask No facemask Univariate OR (95% CI) p Multivariate aOR (95% CI) p Correct position Incorrect position Univariate OR (95% CI) p Multivariate aOR (95% CI) p
Number 1892 (56.4) 1462 (43.6)      1422 (75.2) 470 (24.8)     
Area
 Urban 1172 (54.8) 967 (45.2) Reference   Reference   840 (71.7) 332 (28.3) Reference   Reference  
 Rural 720 (59.3) 495 (40.7) 1.2 (1.04–1.39) 0.012 1.18 (0.98–1.41) 0.075 582 (80.8) 138 (19.2) 1.67 (1.33–2.08)  < 0.001 1.38 (1.07–1.79) 0.03
Location
 Outdoor 679 (39.6) 1036 (60.4) Reference   Reference   455 (67) 224 (33) Reference   Reference  
 Indoor 1213 (74) 426 (26) 4.35 (3.7–5)  < 0.001 2.7 (2.28–3.19)  < 0.001 967 (79.7) 246 (20.3) 1.92 (1.56–2.38)  < 0.001 1.85 (1.49–2.3)  < 0.001
Mandatory
 No 1359 (49) 1414 (51) Reference   Reference   1016 (74.8) 343 (25.2) Reference    
 Yes 533 (91.7) 48 (8.3) 11.11 (8.33–16.67)  < 0.001 6,92 (5–9,7)  < 0.001 406 (76.2) 127 (23.8) 1.08 (0.85–1.37) 0.52   
Time of day
 Morning 800 (55) 654 (45) Reference   Reference   641 (80.1) 159 (19.9) Reference   Reference  
 Afternoon 1092 (57.5) 808 (42.5) 1.1 (0.96–1.27) 0.16 1.27 (1.07–1.5) 0.007 781 (71.5) 311 (28.5) 0.62 (0.5–0.78)  < 0.001 0.82 (0.64–1.05) 0.11
Type of mask
 Surgical        770 (71.6) 305 (28.4) Reference   Reference  
 Cloth        652 (79.8) 165 (20.2) 1.56 (1.27–1.96)  < 0.001 1.53 (1.23–1.91)  < 0.001
Gender
 Female 1190 (61.2) 753 (38.8) Reference   Reference   896 (75.3) 294 (24.7) Reference    
 Male 702 (49.8) 709 (50.2) 0.63 (0.55–0.72)  < 0.001 0.57 (0.49–0.65)  < 0.001 526 (74.9) 176 (25.1) 1.02 (0.82–1.27) 0.86   
Age category
 21–40 years 717 (48) 778 (52) Reference   Reference   487 (67.9) 230 (32.1) Reference   Reference  
 41–65 years 724 (61.1) 460 (38.9) 1.71 (1.46–1.99)  < 0.001 1.7 (1.43–2.02)  < 0.001 578 (79.8) 146 (20.2) 1.87 (1.47–2.38)  < 0.001 1.75 (1.37–2.23)  < 0.001
  > 65 years 451 (66.8) 224 (33.2) 2.18 (1.81–2.64)  < 0.001 2.28 (1.83–2.85)  < 0.001 357 (79.2) 94 (20.8) 1.79 (1.36–2.37)  < 0.001 1.52 (1.13–2.03) 0.005
  1. Outcome was assessed using multivariate logistic regression estimating odd ratios (ORs) and 95% confidence intervals (CIs). Crude and adjusted odds ratios determine the factors associated with the use and the visual correct positioning of facemask fit. Values presented as number (%). p < 0.05 was considered statistically significant. The multivariate model had no missing data
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