Pregnancy and births

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  • Articles and reports: 11-522-X20020016712
    Description:

    In this paper, we consider the effect of the interval censoring of cessation time on intensity parameter estimation with regard to smoking cessation and pregnancy. The three waves of the National Population Health Survey allow the methodology of event history analysis to be applied to smoking initiation, cessation and relapse. One issue of interest is the relationship between smoking cessation and pregnancy. If a longitudinal respondent who is a smoker at the first cycle ceases smoking by the second cycle, we know the cessation time to within an interval of length at most a year, since the respondent is asked for the age at which she stopped smoking, and her date of birth is known. We also know whether she is pregnant at the time of the second cycle, and whether she has given birth since the time of the first cycle. For many such subjects, we know the date of conception to within a relatively small interval. If we knew the time of smoking cessation and pregnancy period exactly for each member who experienced one or other of these events between cycles, we could model their temporal relationship through their joint intensities.

    Release date: 2004-09-13

  • Articles and reports: 82-003-X20030046981
    Geography: Canada
    Description:

    - About 17% of women who had a baby in the past five years smoked while they were pregnant, and 17% of women who did not smoke during pregnancy had regularly been exposed to others' smoking.

    - Smoking and exposure to smoking during pregnancy is most common among women younger than 25.

    - Regular exposure to others' smoking increased the risk that a woman would smoke while she was pregnant.

    Release date: 2004-07-21

  • Articles and reports: 82-003-X20030036851
    Geography: Canada
    Description:

    This paper looks at what proportion of women who had a baby in the past five years took folic acid supplements when they were pregnant. It examines rates for folic acid supplementation by age, marital status and household income.

    Release date: 2004-05-18
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  • Articles and reports: 11-522-X20020016712
    Description:

    In this paper, we consider the effect of the interval censoring of cessation time on intensity parameter estimation with regard to smoking cessation and pregnancy. The three waves of the National Population Health Survey allow the methodology of event history analysis to be applied to smoking initiation, cessation and relapse. One issue of interest is the relationship between smoking cessation and pregnancy. If a longitudinal respondent who is a smoker at the first cycle ceases smoking by the second cycle, we know the cessation time to within an interval of length at most a year, since the respondent is asked for the age at which she stopped smoking, and her date of birth is known. We also know whether she is pregnant at the time of the second cycle, and whether she has given birth since the time of the first cycle. For many such subjects, we know the date of conception to within a relatively small interval. If we knew the time of smoking cessation and pregnancy period exactly for each member who experienced one or other of these events between cycles, we could model their temporal relationship through their joint intensities.

    Release date: 2004-09-13

  • Articles and reports: 82-003-X20030046981
    Geography: Canada
    Description:

    - About 17% of women who had a baby in the past five years smoked while they were pregnant, and 17% of women who did not smoke during pregnancy had regularly been exposed to others' smoking.

    - Smoking and exposure to smoking during pregnancy is most common among women younger than 25.

    - Regular exposure to others' smoking increased the risk that a woman would smoke while she was pregnant.

    Release date: 2004-07-21

  • Articles and reports: 82-003-X20030036851
    Geography: Canada
    Description:

    This paper looks at what proportion of women who had a baby in the past five years took folic acid supplements when they were pregnant. It examines rates for folic acid supplementation by age, marital status and household income.

    Release date: 2004-05-18
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