Table 2. Association of Gender, Parental Leave, and Calendar Year With Cataract Surgery Volume and Total Procedural Volume.
| Variable | Regression Coefficient (95% CI) | |||||
|---|---|---|---|---|---|---|
| Cataract Surgery Volume | Total Procedural Volume | |||||
| Analysis 1a | Analysis 2b | Analysis 3c | Analysis 4d | Analysis 5e | Analysis 6f | |
| Gender, mean difference | −15.0 (−22.2 to −7.8) | −15.3 (−23.5 to −7.2) | −6.0 (−20.5 to 8.4) | −58.1 (−80.2 to −36.0) | −64.1 (−89.3 to −38.9) | −18.1 (−60.8 to 24.5) |
| P value | <.001 | <.001 | .41 | .001 | <.001 | .40 |
| Leave, mean difference | NA | 27.5 (13.3 to 41.6) | 25.9 (12.4 to 39.5) | NA | 20.0 (−23.7 to 63.8) | 13.3 (−26.7 to 53.2) |
| P value | NA | <.001 | <.001 | NA | .37 | .52 |
| Gender × leave, β coefficient | NA | −29.5 (−50.8 to −8.1) | −29.5 (−50.0 to −9.0) | NA | −25.4 (−91.7 to 41.0) | −25.9 (−86.5 to 34.7) |
| P value | NA | .007 | .005 | NA | .45 | .40 |
| Year, β coefficient | NA | NA | 5.5 (4.4 to 6.7) | NA | NA | 24.4 (20.9 to 27.8) |
| P value | NA | NA | <.001 | NA | NA | <.001 |
| Gender × year, β coefficient | NA | NA | −1.6 (−3.7 to 0.4) | NA | NA | −8.0 (−14.0 to −2.1) |
| P value | NA | NA | .11 | NA | NA | .008 |
Abbreviation: NA, not applicable.
a
Regression analysis of cataract surgery volume and gender.
b
Regression analysis of cataract surgery volume, gender, and leave status.
c
Regression analysis of cataract surgery volume, gender, leave status, and year.
d
Regression analysis of total procedural volume and gender.
e
Regression analysis of total procedural volume, gender, and leave status.
f
Regression analysis of total procedureal volume, gender, leave status, and year.