Table 3.
Differences in particle concentrations between laryngeal operation techniques (laser, n = 8; microdebrider, n = 4; cold instruments, n = 10)
| CO2 laser–cold instruments | Microdebrider–cold instruments | Microdebrider–CO2 laser | ||
|---|---|---|---|---|
| Total particle concentration, particles/cm3 | ||||
| Difference (95% CI) | 1.80 (1.65 to 1.95) | 0.47 (0.22 to 0.72) | − 1.33 (− 1.56 to − 1.10) | |
| p value | < 0.001 | < 0.001 | < 0.001 | |
| < 1 μm particle concentration, particles/cm3 | ||||
| Difference (95% CI) | 2.02 (1.85 to 2.18) | 0.49 (0.21‒0.77) | − 1.53 (− 1.78 to − 1.27) | |
| p value | < 0.001 | < 0.001 | < 0.001 | |
| 1–5 μm particle concentration, particles/cm3 | ||||
| Difference (95% CI) | 1.80 (1.57 to 2.03) | 0.40 (0.02 to 0.79) | − 1.39 (− 1.75 to − 1.04) | |
| p value | < 0.001 | 0.040 | < 0.001 | |
| > 5 μm particle concentration, particles/cm3 | ||||
| Difference (95% CI) | 0.15 (− 0.03 to 0.32) | 0.114 (− 0.18 to 0.41) | − 0.03 (− 0.30 to 0.24) | |
| p value | 0.119 | 0.633 | 0.956 |
Results from one-way ANOVA post hoc Tukey HSD test for multiple pairwise comparisons, adjusted by technique used for the laryngeal operation
p value reported after adjustment for multiple comparisons and the statistically significant results are bolded