| PSP Operators’ characteristics | Safety measure practices | Total (%) | χ2 p value | |
| Always use Hand gloves (%) | Not always use Hand gloves (%) | |||
| Level of education | ||||
| Primary | 14 (10.2) | 14 (11.8) | 28 (10.9) | 0.679 |
| Secondary | 65 (47.4) | 50 (42.0) | 115 (44.9) | |
| Tertiary | 58 (42.3) | 55 (46.2) | 113 (44.1) | |
| Knowledge of waste management | ||||
| Poor knowledge | 45 (32.8) | 36 (30.3) | 81 (31.6) | 0.656 |
| Good knowledge | 92 (67.2) | 83 (69.7) | 175 (68.4) | |
| Total | 137 | 119 | 256 | |
| Always use nose mask (%) | Not always use nose mask (%) | |||
| Level of education | ||||
| Primary | 7 (7.7) | 21 (12.7) | 28 (10.9) | 0.459 |
| Secondary | 43 (47.3) | 72 (43.6) | 115 (44.9) | |
| Tertiary | 41 (45.1) | 72 (43.6) | 113 (44.1) | |
| Knowledge of waste management | ||||
| Poor knowledge | 25 (27.5) | 56 (33.9) | 81 (31.6) | 0.287 |
| Good knowledge | 66 (72.5) | 109 (66.1) | 175 (68.4) | |
| Total | 91 | 165 | 256 | |