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Biomedical subjects

S Wadhera

Publications and source records attributed to S Wadhera.

33 records · Page 2Linked to original sources
PubMed1991

Trends in low birthweight Canada. 1971 to 1989.

This paper reviews the levels of and the trends in low birthweight (under 2,500 grams) and premature births (less than 37 weeks gestation) in Canada from 1971 to 1989. Low birthweight (LBW) characterized 6.6% of births in 1971 and 4.6% of births in 1989: this represents a decline of 30% in LBW for the period. The decline was evident for mothers in all age groups, and for all birth parities. However, the prevalence of very low birthweights (less than 1,500 g) remained stable during the period, accounting for 0.8% of births in 1971 and 0.7% in 1989. Preterm births (less than 37 weeks of gestation) increased from 47% of all LBW births in 1971 to 60% in 1989. This shift and the small decline in the prevalence of preterm LBW babies has clinical and preventive implications. These and other findings are based on analysis of 6.6 million single live births between 1971 and 1989.

Adult↗
PubMed1991

Teenage pregnancies, Canada, 1975-1989.

There were 19,000 fewer teenage pregnancies in 1989 than the 58,600 in 1975. The teenage pregnancy rate (pregnancies per 1,000 women aged 15-19) declined 17.4% to 44.1 in 1989 from 53.4 in 1975. For 13 of the 15 years under study, both the numbers and rates of teenage pregnancies decreased year after year. Of teenage pregnancies in 1989, 58% resulted in live births, 36% in therapeutic abortions and 6% in other pregnancy terminations including stillbirths. The annual pregnancy rates for younger teenagers (15-17) were about 60% lower than the rates for older teenagers (18-19). In 1989, the teenage pregnancy rates for Prince Edward Island, New Brunswick and Quebec were lower than the national rate, while rates for Nova Scotia, Ontario and the four western provinces were higher.

Abortion, Therapeutic↗
PubMed1991

Patterns and change in Canadian fertility 1971-1988: first births after age 30.

An analysis of Canada's changing pattern of births during the period 1971-1988 suggests that the tempo and timing of fertility has changed. Between 1971 and 1988, the number and rates of first births to women in their 30s increased rapidly, and rates for women younger than 25 declined. The rate of first births (first births per 1,000 women) for women 30-34 increased from 11.5 in 1971 to 17.1 in 1981 and to 22.3 in 1988--a 94% increase over the 17 years. The rate for women 35-39 also rose from 3.0 in 1971 to 3.6 in 1981 and 5.9 in 1988--a 97% increase occurring mostly in the 1980s.

Adolescent↗
PubMed1990

Therapeutic abortions, Canada, 1970-1988.

A total of 66,251 therapeutic abortions were performed in hospitals in Canada in 1988, an increase of 4.1% from the 63,662 performed in 1987. The abortion rate per 1,000 women 15-44 years was 10.6% in 1988, up from 10.2% in 1987. The number of therapeutic abortions performed annually peaked at 66,319 in 1982. The abortion rate peaked at 11.6% in 1979. Looking at marital status at the time of abortion in 1988, 67% of the women were single, 22% were married and 11% were widowed, divorced, separated, or living common law. About 22% of the women were under 20 years of age, 54.4% were between 20-29 years, 21.5% were between 30-39 years and 2.2% were over 39 years of age. At the time of pregnancy termination, the gestation period was under 13 weeks for 89.6% of abortion cases. The gestation period was 13 weeks or more for 10.4% of abortion cases. The trend towards abortions performed in the early stages of pregnancy may be one of the reasons for a 50% drop in the abortion complication rate to 1.6% of abortions in 1988 from 3.2% of abortions in 1975.

Abortion, Therapeutic↗
PubMed1989

Trends in birth and fertility rates, Canada, 1921-1987.

This paper examines Canadian birth data from 1921 to 1987. Generally, birth and fertility rates have been declining since the baby boom of the 1940s and 1950s. Since 1972, Canada's total fertility rate has remained below the replacement level of 2.1, paralleling trends in the United States and other Western countries. From 1971 to 1987, the median age of mothers increased by two years for all births, and about three years each for first and second births. Changes in rates by province and by age are also examined.

Adolescent↗
PubMed1989

Therapeutic abortions, Canada, 1987.

A total of 63,662 therapeutic abortions were performed in hospitals in Canada in 1987, an increase of 0.2% from the 63,508 performed in 1986. The abortion rate per 1,000 women 15-44 years was 10.2 in 1987, as it had been in 1986. Looking at marital status at the time of abortion, 67.3% of women were single, 21.8% married and the remaining 10.9% were separated, divorced, widowed or living common-law. About 22% of the women were under 20 years of age, 54.3% were between 20-29 years, 21.3% were from 30 to 39 years and 2.4% were over 39 years of age. At time of pregnancy termination, the gestation period was under 13 weeks for 88.5% of abortion cases, 13 to 16 weeks for 8% of cases, and over 16 weeks for 3.5% of cases.

Abortion, Legal↗
PubMedDate not supplied

Repeat abortions in Canada, 1975-1993.

In Canada, 20% of women who obtained an abortion between 1975 and 1993 had had at least one previous abortion. An analysis of data on 1.2 million abortions shows that the proportion of abortion patients undergoing repeat procedures increased from 9% to 29% over the 19-year period. The proportion was above average (22-28% for all years combined) among women who were in common-law marriages, those aged 25-39 and those who had previously had children. In 1993, 27 women per 1,000 who had ever had an abortion underwent another one, while 13 women per 1,000 who had never had an abortion obtained their first one; among teenagers, the repeat rate was four times the rate of first abortions (81 per 1,000 vs. 19 per 1,000). During the study period, the repeat rate rose sharply among women younger than 25 but fell among those aged 30 and older. In 1993, fewer than 2% of abortions were obtained by women who had had three or more previous procedures, suggesting that abortion is not widely used as a primary method of birth control.

Abortion, Legal↗
PubMedDate not supplied

A perspective on Canadian teenage births, 1992-94: older men and younger women?

This article uses vital statistics relating to births by Canadian mothers between 1992 and 1994 to examine the distribution of age of father by age of mother at the birth of the child. Over 77% of births to teenage mothers involved males who were older than the mother. At the time of birth of the child, the mean difference between age of the teenage mother and the father was 4.1 years, compared with a mean of 2.6 years for all mothers and fathers. For mothers below the age of 18 years, 37% of partners were within 2 years of the woman's age, 39% were 3 to 5 years older, and 24% were six or more years older. Family planning and sex education programs directed at the prevention of teenage pregnancy, especially if these programs are given in the elementary or high school system, would not necessarily reach older males, who make up the majority of partners in teenage pregnancies.

Adolescent↗