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Table 9-1
Live births, by characteristics of the mother and child, Canada — Birth weight indicators

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Birth weight indicators
Characteristics of mother and child Live births 1 Birth weight
Less than 1,500 grams Less than  2,500 grams 2,500 to  4,499 grams 4,500 grams or more
  number percent
Age of mother, all ages 2 367,864 1.0 6.0 92.1 1.9
Under 20 years 15,280 1.2 6.3 91.6 2.0
20 to 34 years 286,194 0.9 5.7 92.4 1.8
35 to 49 years 66,340 1.3 7.1 90.9 2.0
Not stated 3 50 10.0 22.0 78.0 0.0
Total, parity of mother 367,864 1.0 6.0 92.1 1.9
First live birth 163,446 1.1 6.3 92.2 1.5
Second live birth 129,886 0.9 5.4 92.7 1.9
Third live birth or more 74,495 1.0 6.5 90.8 2.6
Not stated 37 0.0 5.4 64.9 0.0
Total, marital status of mother 4 367,864 1.0 6.0 92.1 1.9
Married and/or separated 227,944 0.9 5.6 92.5 1.9
Not married 100,347 1.1 6.3 91.8 1.8
Not stated 39,573 1.4 7.3 90.6 2.1
Total, birthplace of mother 367,864 1.0 6.0 92.1 1.9
Canada 268,158 0.9 5.8 92.1 2.1
Outside Canada 94,622 1.1 6.6 92.2 1.2
Not stated 5,084 1.8 7.3 91.3 1.4
Both sexes 367,864 1.0 6.0 92.1 1.9
Males 188,337 1.0 5.6 91.9 2.5
Females 179,527 1.0 6.4 92.3 1.3
Total 367,864 1.0 6.0 92.1 1.9
Single 356,305 0.7 4.5 93.5 1.9
Multiple 11,559 8.8 51.9 48.1 0.0
Total, weeks of gestation 367,864 1.0 6.0 92.1 1.9
Less than 28 weeks 1,621 99.2 99.6 0.2 0.0
28 to 36 weeks 26,951 7.4 52.2 47.6 0.2
37 to 41 weeks 336,991 0.0 1.9 96.1 2.0
42 weeks or more 2,146 0.0 0.3 91.9 7.8
Not stated 155 0.0 3.2 56.1 1.3
Number of live births includes births with unknown birth weight.
Age of mother attained at the last birthday preceding delivery.
For confidentiality reasons, live births to mothers aged 50 and over are included in the category "Age of mother, not stated." Where information is unavailable on the birth mother of children who are adopted, these records are included in the category "Age of mother, not stated."
Partway through 2003, Alberta Registries amended their Registration of Birth form in such a way that Statistics Canada can no longer determine the legal marital status of those persons in common-law marriages.
Source(s):
Statistics Canada, Canadian Vital Statistics, Birth Database (CANSIM table 102-4511).