Table 4. Percentage distributions of variables related to training, patient care, social contact and mask compliancea.
| Characteristic | Control
(n = 143) |
Case
(n = 72) |
Matched OR (exact 95% CI) |
p value
(exact) |
||
|---|---|---|---|---|---|---|
| n | % | N | % | |||
| Length of SARS infection control training |
|
|
|
|
|
|
| None |
40 |
28.0 |
36 |
50.0 |
1.00 |
|
| <2hrs |
67 |
46.9 |
33 |
45.8 |
0.47 (0.18 to 1.14) |
0.1028 |
|
>2hrs |
36 |
25.2 |
3 |
4.2 |
0.03 (0.001 to 0.20) |
<0.0001 |
| Understood infection control measuresb |
|
|
|
|
|
|
| Yes |
130 |
91.5 |
54 |
76.1 |
1.00 |
|
| No |
12 |
8.5 |
17 |
23.9 |
3.14 (1.35 to 7.73) |
0.0065 |
| Acquired updated information |
|
|
|
|
|
|
| No |
5 |
3.5 |
8 |
11.1 |
1.00 |
|
| Yes |
136 |
96.5 |
64 |
88.9 |
0.27 (0.06 to 1.04) |
0.0574 |
| High risk procedures with SARS patientsc |
|
|
|
|
|
|
| No |
115 |
86.5 |
60 |
83.3 |
1.00 |
|
| Yes |
18 |
13.5 |
12 |
16.7 |
1.22 (0.45 to 3.14) |
0.8061 |
| Direct contact with SARS patients |
|
|
|
|
|
|
| No/Not sure |
38 |
26.6 |
27 |
37.5 |
1.00 |
|
| Yes |
105 |
73.4 |
45 |
62.5 |
0.57 (0.28 to 1.14) |
0.1197 |
| Direct contact with patients in general |
|
|
|
|
|
|
| No/Not sure |
7 |
4.9 |
3 |
4.2 |
1.68 |
1.000 |
| Yes |
136 |
95.1 |
69 |
95.8 |
(0.07 to 117.74) |
|
| Seconded from another unit |
|
|
|
|
|
|
| No |
77 |
53.8 |
46 |
63.9 |
1.00 |
|
| Yes |
66 |
46.2 |
26 |
36.1 |
0.60 (0.29 to 1.21) |
0.1671 |
| Social contact with SARS patients |
|
|
|
|
|
|
| No/Not sure |
95 |
66.4 |
55 |
76.4 |
1.00 |
|
| Yes |
48 |
33.6 |
17 |
23.6 |
0.59 (0.28 to 1.19) |
0.1592 |
| Frequency of touching the N95d |
|
|
|
|
|
|
| Most of the time/Always |
33 |
23.4 |
19 |
29.2 |
1.32 (0.63 to 2.74) |
0.5205 |
| General problems with maske |
68 |
48.6 |
28 |
40.6 |
0.66 (0.34 to 1.27) |
0.2407 |
| Problems with mask fitf |
70 |
49.0 |
33 |
47.8 |
1.00 (0.51 to 1.95) |
1.0000 |
| Problems with fogging of gogglesg |
75 |
52.8 |
26 |
40.0 |
0.61 (0.31 to 1.17) |
0.1520 |
| Overall problems in general complianceh | 69 | 50.0 | 29 | 41.4 | 0.58 (0.25 to 1.33) | 0.2264 |
aOR, odds ratio; CI, confidence interval; SARS, severe acute respiratory syndrome. bInformation on 1 control and 1 case missing. cInformation on 10 controls with direct contact with SARS patients missing. dExcluded 2 controls and 6 cases who did not use N95 mask; information on 1 case missing. eExcluded 1 case who did not use mask; information on 3 controls and 2 cases missing. fExcluded 1 case who did not use mask; information on 2 cases missing. gExcluded 3 cases who did not use goggle; information on 1 control and 3 cases missing hExcluded 1 case who did not use any equipment; information on 5 controls and 1 case missing