The quick summary is only 39% of respondents believe they are buiding a big enough nest egg to fund a traditional retirement.
Because of this, most plan on working in retirement As the chart (from the study) below shows, 54% of the respondents plan to work past age 65 and/or in retirement.
Also, only 19% said they did not plan to work in retirement. 27% weren't sure.
This continues a pattern started a about a decade ago of more people saying they plan to work in retirement. However, up until the Great Recession surveys consistently showed that the main reason people were planning to work in retirement was to stay active or involved.
As the chart below (also from the study) shows, this is no longer the case. Income is now the primary driver for wanting/needing to work in retirement.
The bad news is people aren't financially prepared for a traditional retirement.
People not being prepared to retire is a popular theme these days with the press. For more on this topic, see the Forbes article 6 Reasons You'll Never Retire or Classic Retirement Becoming Less Likely from Investment News.