Workers without health insurance options are more likely to defer retirement to stay covered under their company’s plan, according to Watson Wyatt Worldwide.

Employees who rely on their company healthcare coverage and do not expect to receive company-provided retirement health benefits are 16.5 percentage points less likely to retire in any given year than workers with access to healthcare coverage through other sources such as a spouse’s health plan, public health insurance, or COBRA coverage, Watson Wyatt says.

The Watson Wyatt analysis also shows that other factors influencing the retirement decision include the type of retirement plan offered—defined benefit plans such as traditional pensions increase the likelihood of retirement by 4.1 percentage points compared to defined contribution plans such as a 401(k).