Table 3. Bivariate and multivariate regression analysis of factors associated with the understanding of the instructions for use among the 322 study participants.
| Characteristic | Understanding of the instructions of use£ | |||||
|---|---|---|---|---|---|---|
| n (%) | Total | cOR [95% CI] | P* | aOR [95% CI] | P** | |
| Age (years) | ||||||
| 18–29 | 157 (79.7) | 197 | 1.03 [0.59–1.79] | < 0.01 | Reference | - |
| 30–39 | 70 (87.5) | 80 | 2.43 [1.14–5.17] | < 0.01 | 2.73 [1.07–7.00] | 0.056 |
| ≥ 40 | 29 (64.4) | 45 | 0.35 [0.18–0.70] | < 0.01 | 0.66 [0.26–1.69] | 0.291 |
| Educational levelμ | ||||||
| Low | 39 (73.6) | 53 | 0.67 [0.34–1.32] | < 0.0001 | 0.41 [0.12–1.46] | 0.170 |
| Middle | 102 (71.8) | 142 | 0.43 [0.25–0.75] | < 0.0001 | 0.46 [0.18–1.20] | 0.111 |
| High | 115 (90.6) | 127 | 3.67 [1.87–7.19] | < 0.0001 | Reference | - |
| Language used | ||||||
| French | 142 (89.9) | 158 | 3.59 [1.96–6.57] | < 0.0001 | Reference | - |
| Lingala | 34 (61.8) | 55 | 0.29 [0.15–0.54] | < 0.0001 | 0.31 [0.12–0.81] | 0.017 |
| Swahili | 80 (73.4) | 109 | 0.68 [0.39–1.19] | < 0.0001 | 0.35 [0.14–0.92] | 0.034 |
£ The correct answers to a minimum of five questions were considered to have understood the instructions for use;
* P-value calculated using Pearson’s χ2 test or Fisher’s exact test;
** P-value calculated using logistic regression analysis;
μ Educational level was categorized according to the educational system of the Democratic Republic of the Congo, as follows: (i) low: unschooled or attending primary school; (ii) middle: attending college or technical school; and (iii) high: attending Bachelor’s or graduate degree.
aOR: adjusted odds ratios; cOR: crude odds ratios; CI: confidence interval; P: P-value.