Table 3.
Univariate and multivariate analyses of associations between “Knowledge”‡ and demographic factors.
| Univariate analysis |
Multivariate analysisa |
|||||
|---|---|---|---|---|---|---|
| Factor | N [%] | Mean (SD) | Mean difference (95% confidence interval) | P | Mean difference (95% confidence interval) | P |
| Age | ||||||
| <45 | 18 [18] | 75 (14.7) | Reference | Reference | ||
| 45–64 | 68 [67] | 72 (14.6) | −3 (−10 to 5) | 0.67 | −2 (−10 to 6) | 0.86 |
| ≥65 | 15 [15] | 70 (16.0) | −5 (−15 to 5) | 0.38# | −3 (−14 to 8) | 0.60# |
| Gender | ||||||
| Male | 17 [17] | 72 (13.7) | Reference | Reference | ||
| Female | 84 [83] | 73 (15.0) | 1 (−7 to 8) | 0.88 | −1 (−9 to 8) | 0.89 |
| Education | ||||||
| Elementary school | 18 [18] | 69 (14.5) | Reference | Reference | ||
| High school | 20 [20] | 76 (17.4) | 7 (−3 to 16) | 0.37 | 6 (−4 to 16) | 0.50 |
| University | 62 [61] | 73 (13.5) | 4 (−4 to 11) | 0.37# | 3 (−5 to 12) | 0.46# |
| Missing | 1 [1] | – | – | – | ||
| Living alone or not | ||||||
| Cohabitant | 70 [69] | 74 (12.7) | Reference | Reference | ||
| Alone | 30 [30] | 70 (17.9) | −4 (−11 to 2) | 0.17 | −4 (−11 to 2) | 0.19 |
| Missing | 1 [1] | – | – | – | ||
| Randomized study or not | ||||||
| Not randomized | 22 [22] | 77 (16.8) | Reference | Reference | ||
| Randomized | 79 [78] | 71 (14.0) | −6 (−13 to 2) | 0.12 | −6 (−13 to 1.3) | 0.11 |
| Total number of patients in the study with information on knowledge | 101 | 72 (14.7) | ||||
‡ Part A. Phase specific questions excluded. Total number of questions included 14 (out of 20). For each question, correct answers are assigned a score of 100, unsure and incorrect answers are assigned a score of 0.# Test for linear trend. a Adjusted for all other listed factors. a Adjusted for all listed factors.
Linear regression was used to estimate mean differences and confidence intervals. All reported p-values are two-sided and based on the Wald test.