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Biomedical subjects

S Wadhera

Publications and source records attributed to S Wadhera.

At least 19 recordsLinked to original sources
PubMed1997

Teenage pregnancies, 1974 to 1994.

OBJECTIVES: This article provides an overview of trends from 1974 to 1994 in pregnancies among women aged 15 to 19. DATA SOURCES: Vital statistics, abortion data, and hospital morbidity files maintained by Statistics Canada were used to develop estimated of pregnancies, live births, abortions, and stillbirths/miscarriages. ANALYTICAL TECHNIQUES: Rates of pregnancy, live birth, abortion and stillbirth/miscarriage are based on the female population aged 15 to 19. MAIN RESULTS: In 1994, there were an estimated 46,800 teenage pregnancies. This marked the continuation of an almost steady rise from 1987, when the number was 39,300. As well, there has been an increase in the percentage of teenage pregnancies ending in an abortion.

Abortion, Induced↗
PubMed1997

Marital status and abortion.

OBJECTIVES: This article examines the marital status of women who obtained abortions between 1974 and 1994, with particular attention to those who were married or in common-law relationships. DATA SOURCES: The data come from Statistics Canada's publications on abortions, in-patient hospital morbidity data, and reports from the United States. ANALYTICAL TECHNIQUES: Crude and age-standardized abortion rates from 1974 to 1994 were calculated by marital status. MAIN RESULTS: While abortion rates were highest for single women, those who were married (including common-law and separated) accounted for over one-quarter of all abortions performed in 1994. Since 1974, the age-standardized abortion rate per 1,000 married women aged 15 to 44 almost doubled from 6.6 to 11.2. For most of these women, it was their first abortion, and the majority had taken at least one pregnancy to term.

Abortion, Induced↗
PubMed1996

Pregnancy outcomes.

Live births, induced abortions, and miscarriages/stillbirths are usually examined separately. This article combines the three outcomes to focus on pregnancy in Canada from 1974 to 1992. An estimated 525,100 pregnancies ended in Canada during 1992. While this was a substantial increase from 438,300 in 1974, the pregnancy rate in 1992-77 pregnancies per 1,000 women aged 15 to 44-was actually lower than in 1974, when it had been 85 per 1,000. As the pregnancy rate declined, there was a shift in outcomes. The share of pregnancies that ended in live births fell from 79% to 76%, and the proportion ending in miscarriages/stillbirths went from 9% to 5%. A growing proportion of pregnancies ended in abortions: 19% in 1992, compared with 12% in 1974. Trends in pregnancies varied with the age of the women. Pregnancy rates rose among those in their thirties, but dropped at all other ages. Consequently, older women accounted for a larger share of pregnancies at the end of the period than they had at the beginning. Pregnancy outcomes also differed depending on the women's age. The proportion that ended in an abortion was relatively high among women under age 25 and age 40 and over. Throughout the 1974-1992 period, the proportion of pregnancies ending in miscarriages or stillbirths fell among women of all ages.

Abortion, Induced↗
PubMed1996

Declining cesarean section rates: a continuing trend?

Since the mid-1980s, cesarean section rates in Canada have declined. By 1993, 18 of every 100 deliveries were by cesarean section, compared with close to 20 per 100 in 1987. As well, in 1993, 9 of every 100 deliveries were primary cesareans, down from a high of almost 11 per 100 in the mid-1980s. And the repeat cesarean section rate fell from 39 per 100 cesareans in the mid-1980s to 34 in 1993. A major factor in the downtum of cesarean section rates has been a steady increase in vaginal births after cesarean section (VBACs). From 1979 to 1993, the rate rose more than tenfold from 3 to 33 per 100 women who previously had a cesarean section. This trend toward VBAC deliveries was apparent among women in all age groups. Within Canada, there are large provincial differences in cesarean section and VBAC rates. In 1993, cesarean rates ranged from 15 per 100 deliveries in Manitoba to 22 in New Brunswick. VBAC rates ranged from 16 per 100 previous cesarean sections in New Brunswick and Newfoundland to 42 in Alberta. This article traces trends in cesarean section and VBAC rates in Canada and the provinces from 1979 to 1993. The data are based on individual patient admission/separation records of general and allied hospitals, that are submitted to Statistics Canada.

Adult↗
PubMed1994

Second trimester abortions: trends and medical complications.

As a proportion of total abortions, those performed in the second trimester declined from 21% in 1974 to 10% in 1991. Second trimester (13 to 24 weeks) abortions were more frequent among women who were single, under age 20, and without prior deliveries or abortions. The stage of pregnancy at which an abortion was performed and the method used were associated with the risk of medical complications. Complication rates increased directly with the period of gestation. The complication rate for second trimester abortions was 13 times higher than that of first trimester abortions (under 13 weeks). The lowest complication rates were found among abortions performed using surgical D&C and suction D&C. The procedures primarily used for abortions at 16 or more weeks' gestation (i.e. the administration of prostaglandin, urea or saline) were associated with higher complication rates.

Abortion, Legal↗
PubMed1992

Demographic trends of marriages in Canada: 1921-1990.

This paper mainly describes levels and trends of marriages and rates and its relationship with demographic and social conditions in Canada from 1921 to 1990. In Canada, the propensity to marry was much higher in the 1960s and early 1970s than in the 1980s. A similar tendency was observed for a few years prior to, and at the beginning of, World War II and a couple of years after. The number of marriages peaked at an all time high of 200,470 in 1972 with a rate of 44.3 per 1,000 unmarried population aged 15-59. By 1986 the number of marriages had declined by 12.4% and the rate by 33.2%, but both the number of marriages and the rate increased marginally in the following three years. Since 1921 the average age at marriage has increased by 3.6 years for brides and 1.7 years for grooms. The proportion of marriages by previously divorced persons increased sharply after 1968. The changes in marriage rates in Canada parallel those exhibited in the United States and other developed countries in the western hemisphere.

Adolescent↗
PubMed1992

Multiple births: trends and patterns in Canada, 1974-1990.

This paper examines Canadian trends and patterns in multiple births in relation to total confinements, singleton births, maternal age, parity, gestational age and birth weight using vital statistics from 1974 to 1990. Multiple-birth rates in Canada increased from 912.8 to 1,058.9 per 100,000 confinements between 1974 and 1990. The increase is especially noticeable for women over 30. The rate of triplet and higher-order births increased from 8.3 to 21.7 per 100,000 confinements between 1974 and 1990. The proportion of multiple-birth babies that were pre-term (< 37 weeks gestation period) increased from 32.8% in 1974 to 45.8% in 1990. Factors associated with the increase in multiple births may include the use of assisted pregnancy techniques, and the fact that women aged 30 and older, who are at higher risk of a multiple birth, and who postponed their child bearing, have increased their fertility. The sharp increase in multiple-birth rates has implications for maternal and child health and health care costs.

Adolescent↗