Uterus at a price: Disability insurance and hysterectomy.

Taiwanese Labor, Government Employee, and Farmer Insurance programs provide 5 to 6 months of salary to enrollees who undergo hysterectomies or oophorectomies before their 45th birthday. These programs create incentives for more and earlier treatments, referred to as inducement and timing effects. Using National Health Insurance data between 1997 and 2011, we estimate these effects on surgery hazards by difference-in-difference and bunching-smoothing polynomial methods. For Government Employee and Labor Insurance, inducement is 11-12% of all hysterectomies, and timing 20% of inducement. For oophorectomies, both effects are insignificant. Enrollees' behaviors are consistent with rational choices. Each surgery qualifies an enrollee for the same benefit, but oophorectomy has more adverse health consequences than hysterectomy. Induced hysterectomies increase benefit payments and surgical costs, at about the cost of a mammogram and 5 pap smears per enrollee.

Surgeon and hospital volume as quality indicators for CABG in Taiwan: examining hazard to mortality and accounting for unobserved heterogeneity.

OBJECTIVE: To investigate whether provider volume has an impact on the hazard of mortality for coronary artery bypass grafting (CABG) patients in Taiwan. DATA SOURCES/STUDY SETTING: Multiple sources of linked data from the National Health Insurance Program in Taiwan. STUDY DESIGN: The linked data were used to identify 27,463 patients who underwent CABG without concomitant angioplasty or valve procedures and the surgeon and hospital volumes. Generalized estimating equations and hazard models were estimated to assess the impact of volume on mortality. The hazard modeling technique used accounts for bias stemming from unobserved heterogeneity. PRINCIPAL FINDINGS: Both surgeon and hospital volume quartiles are inversely related to the hazard of mortality after CABG. Patients whose surgeon is in the three higher volume quartiles have lower 1-, 3-, 6-, and 12-month mortality after CABG, while only those having their procedure performed at the highest quartile of volume hospitals have lower mortality outcomes. CONCLUSIONS: Mortality outcomes are related to provider CABG volume in Taiwan. Unobserved heterogeneity is a concern in the volume-outcome relationship; after accounting for it, surgeon volume effects on short-term mortality are large. Using models controlling for unobserved heterogeneity and examining longer term mortality may still differentiate provider quality by volume.

Hospital ownership and performance: evidence from stroke and cardiac treatment in Taiwan.

This paper compares program expenditure and treatment quality of stroke and cardiac patients between 1997 and 2000 across hospitals of various ownership types in Taiwan. Because Taiwan implemented national health insurance in 1995, the analysis is immune from problems arising from the complex setting of the U.S. health care market, such as segmentation of insurance status or multiple payers. Because patients may select admitted hospitals based on their observed and unobserved characteristics, we employ instrument variable (IV) estimation to account for the endogeneity of ownership status. Results of IV estimation find that patients admitted to non-profit hospitals receive better quality care, either measured by 1- or 12-month mortality rates. In terms of treatment expenditure, our results indicate no difference between non-profits and for-profits index admission expenditures, and at most 10% higher long-term expenditure for patients admitted to non-profits than to for-profits.