Burns and Grove (2003:213) describe population as all the elements that meet the criteria for inclusion in a study. Burns and Grove (2003: 234) define eligibility criteria as âa list of characteristics that are required for the membership in the target populationâ.
Nausea is a sensation of unease and discomfort in the upper stomach with an involuntary urge to vomit. It may precede vomiting, but a person can have nausea without vomiting. When prolonged, it is a debilitating symptom. Nausea is a non-specific symptom, which means that it has many possible causes. Some common causes of nausea are motion sickness, dizziness, migraine, fainting, gastroenteritis (stomach infection) or food poisoning. Nausea is a side effect of many medications including chemotherapy, nauseants or morning sickness in early pregnancy. Nausea may also be caused by anxiety, disgust and depression.
Eating and Nausea. The number of potential reasons for nausea after eating can make it difficult to determine the cause. Nothing can spoil a good meal like a bout of nausea after eating it. The nausea can be caused by many things, from illness to your bodyâs natural reaction to changing hormones. Although many times the nausea will pass, you should visit your doctor if you consistently suffer from nausea after eating, or if it is accompanied by severe pain, fever or other symptoms.