Answer

Simply speaking, without God's name it does not have the status of an oath, although there are opinions that it does. There is a similar discussion about the oath taken by IDF soldiers. In the IDF, the practice is to make a declaration and not to swear. Rabbi Binyahu Bruner has an article about this in Tzohar, and you can look at the discussion there (if I remember correctly, there was also a discussion in the issues that followed).