Each of those four factors is made up of a range of issues. For health, it's both physical and mental health, as well as healthy (or not) behaviors. For money, it's debt, savings, insurance and budgeting. For work, it's work/life balance, career status and opportunities as well as burnout. For life, it's personal satisfaction, sense of purpose, sources of stress and relationships.

Respondents to the survey were scored on each factor, and those who received an overall score of 61 or higher were considered “well,” while those with 60 or below were considered “unwell.” The scary part is that although 77 percent of respondents were considered “well” overall, 68 percent were “unwell” in at least one factor.

The worst was money, in which 42 percent were considered “unwell.” One third were graded “unwell” in the life category, with 30 percent saying they're frequently stressed, and in the health category, just 12 percent came out as “unwell” despite the fact that 39 percent say they struggle not to be so sedentary.

In the work category, although 63 percent were considered “well,” 24 percent said they struggled with limited career growth opportunities and 27 percent are dealing with burnout.

But the biggest stressors are work and finances, the report says, with 98 percent saying they've felt stressed in the last few months. The job itself was the top stressor, with 47 percent saying they have high levels of stress. Saving for the future was next, at 34 percent; paying off debt was an issue for 33 percent and weight stressed 30 percent of respondents.

Employers should take note that of the stressors reported, employee debt is linked to lower productivity at work, the report says. Employees with the highest levels of debt have twice the absenteeism of those with the lowest levels of debt, and miss an additional full week of work more when comparing the two groups.

Different types of debt have different effects, too, with past-due medical bills being the leading indicator of workplace absenteeism; one out of eight workers say they're struggling with unpaid medical bills. But it goes further: 84 percent of those with unpaid medical bills are financially unwell and two thirds don't get enough sleep. Those workers also miss an average of three additional days of work each year.

Surprisingly, student loans and credit card debt turned out not to be a significant cause of employees missing work.

All that stress over debt weighs on employee health, too; only 14 percent of workers battling debt challenges say they're in “excellent” health, compared with 35 percent of workers who aren't mired in debt. They're also notably less likely to get enough sleep (35 percent, compared with 54 percent) and are markedly more likely to be frequently stressed or anxious (46 percent, compared with 26 percent).

And poor health correlates to poor financial health, the survey finds; in fact, just four percent of employees with poor health ratings also got strong financial scores, while 60 percent of those who score “well” for health are also financially well