Class interval Health Dictionary

The total number of observations of a particular variable may be grouped according to convenient divisions of the variable range. A group so determined is called a class.... class

A range of values for a variable of interest, e.g. a rate, constructed so that this range has a specified probability of including the true value of the variable. The specified probability is called the confidence level, and the end points of the confidence interval are called the confidence limits.... confidence interval

A temporary restoration of consciousness after a person has been rendered unconscious from a blow to the head. The victim subsequently relapses into COMA. This is a sign of raised INTRACRANIAL PRESSURE from arterial bleeding and indicates that surgery may be required to control the intracranial haemorrhage. (See also GLASGOW COMA SCALE.)... lucid interval

The interval in an ELECTROCARDIOGRAM (ECG) that registers the electrical activity generated during ventricular contraction of the HEART.... q-t interval

Time between paroxysms in malaria.... interval

See “measurement scale”.... interval scale

the interval on an *electrocardiogram between the onset of atrial activity and ventricular activity. It represents the time required for the impulse from the *sinoatrial node to reach the ventricles.... p–r interval

see National Statistics Socio-economic Classification.... social class