Table 2.
Factors predicting the occurrence of glass particle contamination (n = 672)
| Particle | ||||
|---|---|---|---|---|
| Factors | Occurrence (n = 456) n (%) |
Non-occurrence (n = 216) n (%) |
OR (95% CI) | P |
| Method | ||||
| Method 1 (n = 112) | 84 (75.0) | 28 (25.0) | Reference | – |
| Method 2 (n = 112) | 87 (77.7) | 25 (22.3) | 1.19 (0.61–2.35) | 0.610 |
| Method 3 (n = 112) | 64 (57.1) | 48 (42.9) | 0.35 (0.18 − 0.67) | 0.002 |
| Method 4 (n = 112) | 65 (58.0) | 47 (42.0) | 0.37 (0.20 − 0.71) | 0.003 |
| Method 5 (n = 112) | 78 (69.6) | 34 (30.4) | 0.73 (0.38 − 1.40) | 0.338 |
| Method 6 (n = 112) | 78 (69.6) | 34 (30.4) | 0.72 (0.37 − 1.39) | 0.329 |
| Ampoule size | ||||
| 2 ml (n = 336) | 158(47.0) | 178 (53.0) | Reference | – |
| 10 ml (n = 336) | 298 (88.7) | 38 (11.3) | 9.53 (6.19 − 14.69) | 0.000 |
| Work experience, years | ||||
| ≤5 (n = 325) | 235 (72.3) | 90 (27.7) | Reference | – |
| >5 (n = 347) | 221 (63.7) | 126 (36.3) | 0.60 (0.41 − 0.88) | 0.008 |
| Breaking time; mean (SD) | 16.67 (10.60) | 13.38 (7.79) | 1.01 (0.99–1.03) | 0.535 |
Methods: Method 1 = gauze pad and outward direction, Method 2 = gauze pad and inward direction, Method 3 = cotton ball and outward direction, Method 4 = cotton ball and inward direction, Method 5 = syringe wrapper and outward direction and Method 6 = syringe wrapper and inward direction.
CI, confidence interval.