| confidence intervals | 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. (12 Dec 1998) |
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| confidence interval | A range of values for a variable of interest, constructed so that this range has a specified probability of including the true value of the variable. (05 Mar 2000) |
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| birth intervals | Interval between onset of sexual relations by a woman and the birth of her first child and intervals between successive births. This includes use of family planning to control birth intervals. (12 Dec 1998) |
| systolic time intervals | See: electromechanical systole, left ventricular ejection time, preejection period. (05 Mar 2000) |