Other causes include: 1  A fall against a hard surface in the seated position, such as a fall from a horse. 2  A direct blow to the coccyx, such as in contact sports.  Straining or dislocating the coccyx. This can happen due to poor posture while driving, or repetitive injury from sports such as rowing or cycling.
1 Positive test results also can mean that the amount of a substance being tested for is higher or lower than normal. 2  A negative test result means that the substance or condition being tested for was not found. false-negative test result may suggest that a person does not have a disease or condition being tested for when he or she does have it. For example, a false-negative pregnancy test result would be one that does not detect the substance that confirms pregnancy, when the woman really is pregnant.
A panel is a group of similar drugs. For example there might be a barbiturate panel, an opiate panel, etc. So a 14 panel drug scan would be a very thorough test including many drugs. Any drug would be out of your system after 3 months. The hair test isn't done on the entire 14 panels.It is only effective for a relatively small number of drugs, including cocaine.Sorry, I don't know which other ones.or example there might be a barbiturate panel, an opiate panel, etc. So a 14 panel drug scan would be a very thorough test including many drugs. Any drug would be out of your system after 3 months. The hair test isn't done on the entire 14 panels.