TABLE 1.
Baseline Characteristics and Needle Insertion Measurements
| Measures | Full BB (n=16) |
Partial BB (n=8) |
No BB (n=8) |
P Value* |
|---|---|---|---|---|
| Males (n) | 12 (57.1%) | 6 (28.6%) | 3 (14.3%) | 0.16 |
| Females (n) | 4 (36.4%) | 2 (18.2%) | 5 (45.5%) | |
| Caucasians (n) | 11 (42.3%) | 7 (26.9%) | 8 (30.8%) | 0.08 |
| African Americans (n) | 5 (83.3%) | 1 (16.7%) | 0 (0.0%) | |
| Age (years) | 54.6±3.3 | 62.5±5.4 | 62.5±1.7 | 0.10 |
| ECD (cells/mm2) | 2694±143 | 2464±280 | 2317±203 | 0.37 |
| Air Injected (mL) | 2.1±0.3 | 2.6±0.6 | 3.6±0.5 | 0.06 |
| Needle Angle (degrees) | 13.8±1.6 | 12.8±2.6 | 13.8±1.8 | 0.93 |
| CCT (µm) | 539.3±14.6 | 588.6±8.5 | 557.3±21.0 | 0.11 |
| Stroma Below Needle (µm) | 123.9±20.0 | 233.7±23.8 | 316.7±17.3 | <0.0001 |
| Needle Depth (%) | 79.9±3.0 | 66.9±2.6 | 49.9±3.4 | <0.0001 |
BB = Big Bubble; ECD = Endothelial Cell Density; CCT = Central Corneal Thickness.
Data are expressed as number (percentage) and mean±standard error.
*
Chi-square test for nominal variables and one-way analysis of variance (ANOVA) for continuous variables.