rate

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Related to postneonatal mortality rate: Perinatal mortality rate

rate

1. 
a. a price or charge with reference to a standard or scale
b. (as modifier): a rate card
2. a charge made per unit for a commodity, service, etc.
3. a wage calculated against a unit of time
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

rate

[rāt]
(science and technology)
The amount of change of some quantity during a time interval divided by the length of the time interval.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The overall postneonatal mortality rate for SIDS or SUID declined from 2.2 per 1,000 births during 1992-1995 to 1.4 per 1,000 during 2004-2007 (APC = -13.3; CI = -24.3 to -0.7), but no trends were observed for other causes.
Infants born to women aged 15 or younger had a substantially higher postneonatal mortality rate (3.2 per 1,000) than those born to 23-29-year-olds (0.8 per 1,000).
The mean neonatal mortality rate was 6.25 per 1000 live births, and the mean postneonatal mortality rate was 3.75 per 1000 live births.
However, because the non-SIDS postneonatal mortality rate did not change substantially during 1983-1989 and 1990-1994, a shift in diagnosis probably did not account for the larger declines in SIDS during 1990-1994.