Table 2.
Summary of CDE comparisons between Centurion and Infiniti phacoemulsification systems by an individual surgeon and all surgeons combined
| Surgeon | Infiniti | Centurion | Difference (std err): Centurion–Infiniti | Percent difference | P-value* | |
|---|---|---|---|---|---|---|
| 1 | CDE, seconds: mean (std dev) | 7.790 (6.669) | 5.536 (4.458) | −2.254 (0.797) | 28.9% | 0.005 |
| [range] | [1.23, 62.83] | [0.23, 27.62] | ||||
| 2 | CDE, seconds: mean (std dev) | 14.751 (10.225) | 9.785 (7.648) | −4.966 (0.733) | 33.7% | <0.001 |
| [range] | [2.56, 91.86] | [0.08, 61.40] | ||||
| 3 | CDE, seconds: mean (std dev) | 9.071 (6.611) | 5.672 (4.667) | −3.399 (0.399) | 37.5% | <0.001 |
| [range] | [0.10, 51.50] | [0.07, 48.56] | ||||
| 4 | CDE, seconds: mean (std dev) | 27.688 (14.510) | 15.153 (9.512) | −12.535 (1.442) | 45.3% | <0.001 |
| [range] | [5.77, 109.00] | [2.16, 84.57] | ||||
| 5 | CDE, seconds: mean (std dev) | 12.664 (5.394) | 7.739 (3.648) | −4.926 (0.711) | 38.9% | <0.001 |
| [range] | [4.36, 39.22] | [2.58, 23.59] | ||||
| All | CDE, seconds: mean (std dev) | 13.330 (10.942) | 8.359 (7.200) | −4.971 (0.408) | 37.3% | <0.001 |
| [range] | [0.10, 109.00] | [0.07, 84.57] | −5.088 (0.336)** | 38.2% | <0.001 | |
Notes:
*
Statistical comparison between patients using Infiniti phacoemulsification system and those using Centurion phacoemulsification system; two-sample t-tests for continuous variables and chi-square tests for categorical variables.
**
Estimated P-value based on linear mixed-effects model, adjusting for age and sex of patients and different surgeons.
Abbreviations: CDE, cumulative dissipated energy; std err, standard error; std dev, standard deviation.