Table 3. Sensitivity Analyses of Logistic Regression Models for Total Cost Sharing on Early, Uncomplicated Presentation; Optimal Surgical Care; and Minimally Invasive Surgery, 2013-2017.
| Variable | Odds Ratio (95% CI) | ||
|---|---|---|---|
| Early, uncomplicated presentation | Optimal surgical care | Minimally invasive surgery | |
| Total cost-sharing threshold $800, $ (n = 151 852) | |||
| 0-800 | 1 [Reference] | 1 [Reference] | 1 [Reference] |
| >800 | 0.75 (0.73-0.77) | 0.93 (0.90-0.95) | 0.94 (0.89-0.98) |
| Aged 25-64 y (n = 140 571)a | |||
| Total cost-sharing quartile ($) | |||
| Q1 (0-502) | 1 [Reference] | 1 [Reference] | 1 [Reference] |
| Q2 (503-1725) | 0.92 (0.89-0.96) | 0.81 (0.79-0.84) | 1.05 (0.99-1.12) |
| Q3 (1726-3082) | 0.75 (0.72-0.77) | 0.88 (0.85-0.91) | 0.94 (0.89-1.01) |
| Q4 (>3082) | 0.62 (0.60-0.65) | 0.96 (0.93-0.99) | 0.90 (0.84-0.96) |
| Appendicitis (n = 65 424)a | |||
| Total cost-sharing quartile ($) | |||
| Q1 (0-502) | 1 [Reference] | 1 [Reference] | 1 [Reference] |
| Q2 (503-1725) | 1.05 (0.99-1.11) | 1.13 (1.06-1.21) | 1.03 (0.95-1.12) |
| Q3 (1726-3082) | 0.87 (0.83-0.92) | 1.44 (1.35-1.55) | 0.95 (0.88-1.03) |
| Q4 (>3082) | 0.69 (0.65-0.72) | 1.44 (1.35-1.54) | 0.92 (0.85-0.99) |
| Diverticulitis (n = 86 428)a | |||
| Total cost-sharing quartile ($) | |||
| Q1 (0-502) | 1 [Reference] | 1 [Reference] | 1 [Reference] |
| Q2 (503-1725) | 0.83 (0.80-0.87) | 0.75 (0.72-0.78) | 1.08 (0.97-1.19) |
| Q3 (1726-3082) | 0.68 (0.64-0.71) | 0.78 (0.75-0.81) | 0.89 (0.80-0.99) |
| Q4 (>3082) | 0.58 (0.55-0.61) | 0.87 (0.83-0.90) | 0.81 (0.73-0.90) |
| Elixhauser comorbidity model (n = 54 588)b | |||
| Total cost-sharing quartile ($) | |||
| Q1 (0-502) | 1 [Reference] | 1 [Reference] | 1 [Reference] |
| Q2 (503-1725) | 0.89 (0.84-0.94) | 0.78 (0.74-0.82) | 1.08 (0.97-1.20) |
| Q3 (1726-3082) | 0.75 (0.71-0.79) | 0.84 (0.80-0.89) | 0.93 (0.84-1.03) |
| Q4 (>3082) | 0.63 (0.60-0.66) | 0.88 (0.84-0.93) | 0.90 (0.81-0.99) |
Abbreviation: Q, quartile.
a
Adjusted for disease, age, sex, calendar year, year quarter, Social Deprivation Index, rurality, Census Bureau geographic division, and type of benefit plan.
b
Study period October 2015 through December 2017; adjusted for disease, age, sex, calendar year, year quarter, Elixhauser comorbidity index, Social Deprivation Index, rurality, Census Bureau geographic division, and type of benefit plan.