Helen P Koo
Biographic Data
| ID | 166693 |
|---|---|
| NAME | Helen P Koo |
| GIVEN NAMES | Helen P |
| FAMILY NAME | Koo |
| SIGNATURE | KOO H P |
| AFFILIATIONS | RTI International |
| VERIFIED | No |
| TOTAL WORKS | 22 |
| TOTAL CITATIONS | 154 |
| AUTHOR COUNT | 22 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 1980 |
| LATEST PUBLICATION YEAR | 2022 |
| H-INDEX | 7 |
U.S. Women's Knowledge of Reproductive Biology
A Computerized Family Planning Counseling Aid
Computerized counseling aids like Smart Choices are in an early stage of development. Future research is warranted to develop tools that lead to more productive and individualized clinic visits and, ultimately, to more effective contraceptive use and reduced levels of unintended pregnancy
Evaluation of a randomized intervention to delay sexual initiation among fifth-graders followed through the sixth grade
US adolescents initiate sex at increasingly younger ages, yet few pregnancy prevention interventions for children as young as 10-12 years old have been evaluated. Sixteen Washington, DC schools were randomly assigned to intervention versus control conditions. Beginning in 2001/02 with fifth-grade students and continuing during the sixth grade, students completed pre-intervention and post-intervention surveys each school year. Each year, the inter…
Attitudes, Experience, and Anticipation of Sex Among 5th Graders in an Urban Setting
Adolescent Mothers' Postpartum Contraceptive Use
Ongoing follow-up may help reduce adolescent mothers' risk of contraceptive discontinuation postpartum. Increasing use of long-acting methods also may help reduce their vulnerability to gaps in contraceptive use and discontinuation, which increase the risk of unintended pregnancy
Relationships of Pubertal Development Among Early Adolescents to Sexual and Nonsexual Risk Behaviors and Caregivers’ Parenting Behaviors
Using a school-based sample of Washington, DC, fifth graders (mean age 10.38, SD = 0.66) and their parents (N = 408), we examined associations of pubertal development with early adolescents' sexual and nonsexual risk behaviors and their caregivers' parenting behaviors; and of these risk behaviors with parenting behaviors. Youths reporting signs of pubertal development were more likely to engage in these risk behaviors than students reporting no s…
We're the Heroes!”
Research and interventions concerning parent-child communication about sex should not neglect the role of fathers. However, some fathers may need support to overcome barriers to effective communication, especially with their daughters
Parents' Perspectives on Talking to Preteenage Children About Sex
Interventions aimed at encouraging parents to talk to their children about sex should enhance parents' understanding of the stages of children's sexual development and focus on the parents of young children. In addition, interventions should support parents in a range of strategies that complement discussions about sex
Parents' views on sexual debut among pre‐teen children in Washington, DC
OBJECTIVE: Present US parents' perceptions about factors leading to early intercourse and strategies for overcoming them. METHODS: Conducted analysis of eight focus groups with 78 male and female African-American and Hispanic caregivers of fifth-graders and sixth-graders (ages 10-12). RESULTS: Participants gave the following primary reasons for early sexual activity: lack of structured activities, adult supervision, and communication; and influen…
Associations Between Low‐Income Women’s Relationship Characteristics and Their Contraceptive Use
When counseling family planning clients, providers should consider women in the context of their relationships. Future research exploring factors associated with contraceptive method use should examine variables related to the establishment, quality and expectations of their relationships
The multistate life table method
In many demographic behaviors (e.g., those relating to marriage, contraception, migration, and health), people change among multiple statuses through time, sometimes leaving and then returning to the same status. Data on such behaviors are often collected in surveys as censored event histories. The multistate life table (MSLT) can be used to properly describe, in a single analysis, these complex transitions among multiple states measured in such …
The Relationship Context
Little is known about the influence of relationship characteristics on a woman's desire for a baby with her partner. This study addresses that gap, using data from a study of 1,114 low-income women in the southeast who were in a relationship. Controlling for sociodemographic factors, women who were in more established relationships, who had not had a previous child with their partner, or who had higher expectations of their partner were generally…
Context of Acceptability of Topical Microbicides
Domains central to the effects of sexual relationships on the acceptability of a vaginal protection method were explored in 14 focus groups and 38 in‐depth interviews with women and men recruited from a health department's sexually transmitted infections (STI) and family planning clinics. Findings indicate that acceptability depended on a couple's relationship type, classified as serious, casual, or “new.” Potential barriers to communication abou…
The ‘natural’ body, God and contraceptive use in the southeastern United States
Data collected among African-American and Caucasian women and men in the southeastern USA indicate that participants' perceptions of nature, God's will and the human body influence reproductive health and decision-making. Attitudes about the health care system, pharmaceutical companies and government programmes for fertility regulation reinforce these views and may negatively affect willingness to use contraceptive methods consistently and correc…
Age at last birth and its components
This paper examines the ways in which the behavior of twentieth century cohorts of American women changed simultaneously in the three components of fertility that determine age at last birth—age at first birth, spacing between subsequent births, and parity progression ratios of subsequent births—to produce changes in the timing of the completion of childbearing. It decomposes changes in the mean age at last birth among cohorts and between whites …
The Completion of Childbearing
Using data on fertility histories from the 1980 US Current Population Survey which included about 77000 households in a national probability sample the timing of the completion of childbearing (as measured by the age of the mother at her final birth) of successive 20th-Century cohorts of US women (born in 1906-15 1916-25 1926-30 and 1931-35) investigated. Data from the National Survey of Family Growth (NSFG) were also used to examine the likely a…
Childbearing and family in remarriage
Proportional hazards models are used to test hypotheses about the effect of women’s prior childbearing on the probability of having a birth in remarriage and to analyze the effects of other factors. Results indicate that the number of children at the time of remarriage has no effect on childbearing probabilities, but the age of the youngest child has a significant effect. These findings support the view that having a child is important to confirm…
The Effects of Post-marital Childbearing on Divorce and Remarriage
In this paper we examine the effects of having a baby during a period of separation on the probability of divorce, and the impact of bearing a child while divorced on the likelihood of remarriage in the United States. Among whites, neither a first nor a second birth during separation had any significant effect on the probability of divorce. Among blacks, either a first or second birth significantly increased the chance of divorce. The function of…
The effects of children on divorce and re-marriage
Using proportional hazards models and multiple decrement life tables to analyse data from the 1973 National Survey of Family Growth, this study tests the hypotheses that, net of the effects of such factors as age at separation or divorce, the probabilities of divorce after separation and of re-marriage after divorce would be lower for women with larger numbers of children or younger children, and that these transitions would take longer than for …
Childlessness and Marital Stability in Remarriages
The study seeks to increase understanding of variation in the patterning of life-course events and in the structure of families in remarriage by examining the outcomes of these new marriages for us women. It analyzes the probabilities and the timing of having a birth in a 2nd marriage or of ending the marriage without having a child among women still childless at remarriage and those who already have 1 or more children. By comparing these 2 group…
Interrelationships between fertility and marital dissolution
Previous studies have failed to examine (a) the simultaneity of decisions to bear children and to dissolve a marriage and (b) the effects of the childbearing in the period just before dissolution on the likelihood of disruption. We attempted to resolve both problems by developing a simultaneous logit model of the interrelationship between the probability of separation and of having a birth during this period (when dissolution presumably is being …
Effects of Children on Women's Remarriage Prospects
LIFE table analyses of data for white women from the 1975 Current Population Survey showed that the effects of the number of children women had at divorce on their remarriage probabilities depended on the women's age at divorce. Among women divorcing before age 25, being childless increased the likelihood of remarriage; but among women divorcing at 35 or older, having no children decreased it. For women divorcing at age 25 to 34, there was no eff…
Childbearing and family in remarriage
Proportional hazards models are used to test hypotheses about the effect of women’s prior childbearing on the probability of having a birth in remarriage and to analyze the effects of other factors. Results indicate that the number of children at the time of remarriage has no effect on childbearing probabilities, but the age of the youngest child has a significant effect. These findings support the view that having a child is important to confirm…
Parents' Perspectives on Talking to Preteenage Children About Sex
Interventions aimed at encouraging parents to talk to their children about sex should enhance parents' understanding of the stages of children's sexual development and focus on the parents of young children. In addition, interventions should support parents in a range of strategies that complement discussions about sex
The effects of children on divorce and re-marriage
Using proportional hazards models and multiple decrement life tables to analyse data from the 1973 National Survey of Family Growth, this study tests the hypotheses that, net of the effects of such factors as age at separation or divorce, the probabilities of divorce after separation and of re-marriage after divorce would be lower for women with larger numbers of children or younger children, and that these transitions would take longer than for …
Effects of Children on Women's Remarriage Prospects
LIFE table analyses of data for white women from the 1975 Current Population Survey showed that the effects of the number of children women had at divorce on their remarriage probabilities depended on the women's age at divorce. Among women divorcing before age 25, being childless increased the likelihood of remarriage; but among women divorcing at 35 or older, having no children decreased it. For women divorcing at age 25 to 34, there was no eff…
Interrelationships between fertility and marital dissolution
Previous studies have failed to examine (a) the simultaneity of decisions to bear children and to dissolve a marriage and (b) the effects of the childbearing in the period just before dissolution on the likelihood of disruption. We attempted to resolve both problems by developing a simultaneous logit model of the interrelationship between the probability of separation and of having a birth during this period (when dissolution presumably is being …
Associations Between Low‐Income Women’s Relationship Characteristics and Their Contraceptive Use
When counseling family planning clients, providers should consider women in the context of their relationships. Future research exploring factors associated with contraceptive method use should examine variables related to the establishment, quality and expectations of their relationships
The Effects of Post-marital Childbearing on Divorce and Remarriage
In this paper we examine the effects of having a baby during a period of separation on the probability of divorce, and the impact of bearing a child while divorced on the likelihood of remarriage in the United States. Among whites, neither a first nor a second birth during separation had any significant effect on the probability of divorce. Among blacks, either a first or second birth significantly increased the chance of divorce. The function of…
We're the Heroes!”
Research and interventions concerning parent-child communication about sex should not neglect the role of fathers. However, some fathers may need support to overcome barriers to effective communication, especially with their daughters
The multistate life table method
In many demographic behaviors (e.g., those relating to marriage, contraception, migration, and health), people change among multiple statuses through time, sometimes leaving and then returning to the same status. Data on such behaviors are often collected in surveys as censored event histories. The multistate life table (MSLT) can be used to properly describe, in a single analysis, these complex transitions among multiple states measured in such …
The Completion of Childbearing
Using data on fertility histories from the 1980 US Current Population Survey which included about 77000 households in a national probability sample the timing of the completion of childbearing (as measured by the age of the mother at her final birth) of successive 20th-Century cohorts of US women (born in 1906-15 1916-25 1926-30 and 1931-35) investigated. Data from the National Survey of Family Growth (NSFG) were also used to examine the likely a…
Childlessness and Marital Stability in Remarriages
The study seeks to increase understanding of variation in the patterning of life-course events and in the structure of families in remarriage by examining the outcomes of these new marriages for us women. It analyzes the probabilities and the timing of having a birth in a 2nd marriage or of ending the marriage without having a child among women still childless at remarriage and those who already have 1 or more children. By comparing these 2 group…
The Relationship Context
Little is known about the influence of relationship characteristics on a woman's desire for a baby with her partner. This study addresses that gap, using data from a study of 1,114 low-income women in the southeast who were in a relationship. Controlling for sociodemographic factors, women who were in more established relationships, who had not had a previous child with their partner, or who had higher expectations of their partner were generally…
Context of Acceptability of Topical Microbicides
Domains central to the effects of sexual relationships on the acceptability of a vaginal protection method were explored in 14 focus groups and 38 in‐depth interviews with women and men recruited from a health department's sexually transmitted infections (STI) and family planning clinics. Findings indicate that acceptability depended on a couple's relationship type, classified as serious, casual, or “new.” Potential barriers to communication abou…
Relationships of Pubertal Development Among Early Adolescents to Sexual and Nonsexual Risk Behaviors and Caregivers’ Parenting Behaviors
Using a school-based sample of Washington, DC, fifth graders (mean age 10.38, SD = 0.66) and their parents (N = 408), we examined associations of pubertal development with early adolescents' sexual and nonsexual risk behaviors and their caregivers' parenting behaviors; and of these risk behaviors with parenting behaviors. Youths reporting signs of pubertal development were more likely to engage in these risk behaviors than students reporting no s…
Age at last birth and its components
This paper examines the ways in which the behavior of twentieth century cohorts of American women changed simultaneously in the three components of fertility that determine age at last birth—age at first birth, spacing between subsequent births, and parity progression ratios of subsequent births—to produce changes in the timing of the completion of childbearing. It decomposes changes in the mean age at last birth among cohorts and between whites …
Adolescent Mothers' Postpartum Contraceptive Use
Ongoing follow-up may help reduce adolescent mothers' risk of contraceptive discontinuation postpartum. Increasing use of long-acting methods also may help reduce their vulnerability to gaps in contraceptive use and discontinuation, which increase the risk of unintended pregnancy
Effects of Children on Women's Remarriage Prospects
LIFE table analyses of data for white women from the 1975 Current Population Survey showed that the effects of the number of children women had at divorce on their remarriage probabilities depended on the women's age at divorce. Among women divorcing before age 25, being childless increased the likelihood of remarriage; but among women divorcing at 35 or older, having no children decreased it. For women divorcing at age 25 to 34, there was no eff…
Interrelationships between fertility and marital dissolution
Previous studies have failed to examine (a) the simultaneity of decisions to bear children and to dissolve a marriage and (b) the effects of the childbearing in the period just before dissolution on the likelihood of disruption. We attempted to resolve both problems by developing a simultaneous logit model of the interrelationship between the probability of separation and of having a birth during this period (when dissolution presumably is being …
The effects of children on divorce and re-marriage
Using proportional hazards models and multiple decrement life tables to analyse data from the 1973 National Survey of Family Growth, this study tests the hypotheses that, net of the effects of such factors as age at separation or divorce, the probabilities of divorce after separation and of re-marriage after divorce would be lower for women with larger numbers of children or younger children, and that these transitions would take longer than for …
Childlessness and Marital Stability in Remarriages
The study seeks to increase understanding of variation in the patterning of life-course events and in the structure of families in remarriage by examining the outcomes of these new marriages for us women. It analyzes the probabilities and the timing of having a birth in a 2nd marriage or of ending the marriage without having a child among women still childless at remarriage and those who already have 1 or more children. By comparing these 2 group…
Childbearing and family in remarriage
Proportional hazards models are used to test hypotheses about the effect of women’s prior childbearing on the probability of having a birth in remarriage and to analyze the effects of other factors. Results indicate that the number of children at the time of remarriage has no effect on childbearing probabilities, but the age of the youngest child has a significant effect. These findings support the view that having a child is important to confirm…
The Effects of Post-marital Childbearing on Divorce and Remarriage
In this paper we examine the effects of having a baby during a period of separation on the probability of divorce, and the impact of bearing a child while divorced on the likelihood of remarriage in the United States. Among whites, neither a first nor a second birth during separation had any significant effect on the probability of divorce. Among blacks, either a first or second birth significantly increased the chance of divorce. The function of…
The Completion of Childbearing
Using data on fertility histories from the 1980 US Current Population Survey which included about 77000 households in a national probability sample the timing of the completion of childbearing (as measured by the age of the mother at her final birth) of successive 20th-Century cohorts of US women (born in 1906-15 1916-25 1926-30 and 1931-35) investigated. Data from the National Survey of Family Growth (NSFG) were also used to examine the likely a…
Age at last birth and its components
This paper examines the ways in which the behavior of twentieth century cohorts of American women changed simultaneously in the three components of fertility that determine age at last birth—age at first birth, spacing between subsequent births, and parity progression ratios of subsequent births—to produce changes in the timing of the completion of childbearing. It decomposes changes in the mean age at last birth among cohorts and between whites …
The ‘natural’ body, God and contraceptive use in the southeastern United States
Data collected among African-American and Caucasian women and men in the southeastern USA indicate that participants' perceptions of nature, God's will and the human body influence reproductive health and decision-making. Attitudes about the health care system, pharmaceutical companies and government programmes for fertility regulation reinforce these views and may negatively affect willingness to use contraceptive methods consistently and correc…
Context of Acceptability of Topical Microbicides
Domains central to the effects of sexual relationships on the acceptability of a vaginal protection method were explored in 14 focus groups and 38 in‐depth interviews with women and men recruited from a health department's sexually transmitted infections (STI) and family planning clinics. Findings indicate that acceptability depended on a couple's relationship type, classified as serious, casual, or “new.” Potential barriers to communication abou…
The Relationship Context
Little is known about the influence of relationship characteristics on a woman's desire for a baby with her partner. This study addresses that gap, using data from a study of 1,114 low-income women in the southeast who were in a relationship. Controlling for sociodemographic factors, women who were in more established relationships, who had not had a previous child with their partner, or who had higher expectations of their partner were generally…
Parents' views on sexual debut among pre‐teen children in Washington, DC
OBJECTIVE: Present US parents' perceptions about factors leading to early intercourse and strategies for overcoming them. METHODS: Conducted analysis of eight focus groups with 78 male and female African-American and Hispanic caregivers of fifth-graders and sixth-graders (ages 10-12). RESULTS: Participants gave the following primary reasons for early sexual activity: lack of structured activities, adult supervision, and communication; and influen…
Associations Between Low‐Income Women’s Relationship Characteristics and Their Contraceptive Use
When counseling family planning clients, providers should consider women in the context of their relationships. Future research exploring factors associated with contraceptive method use should examine variables related to the establishment, quality and expectations of their relationships
The multistate life table method
In many demographic behaviors (e.g., those relating to marriage, contraception, migration, and health), people change among multiple statuses through time, sometimes leaving and then returning to the same status. Data on such behaviors are often collected in surveys as censored event histories. The multistate life table (MSLT) can be used to properly describe, in a single analysis, these complex transitions among multiple states measured in such …
We're the Heroes!”
Research and interventions concerning parent-child communication about sex should not neglect the role of fathers. However, some fathers may need support to overcome barriers to effective communication, especially with their daughters
Parents' Perspectives on Talking to Preteenage Children About Sex
Interventions aimed at encouraging parents to talk to their children about sex should enhance parents' understanding of the stages of children's sexual development and focus on the parents of young children. In addition, interventions should support parents in a range of strategies that complement discussions about sex
Evaluation of a randomized intervention to delay sexual initiation among fifth-graders followed through the sixth grade
US adolescents initiate sex at increasingly younger ages, yet few pregnancy prevention interventions for children as young as 10-12 years old have been evaluated. Sixteen Washington, DC schools were randomly assigned to intervention versus control conditions. Beginning in 2001/02 with fifth-grade students and continuing during the sixth grade, students completed pre-intervention and post-intervention surveys each school year. Each year, the inter…
Attitudes, Experience, and Anticipation of Sex Among 5th Graders in an Urban Setting
Adolescent Mothers' Postpartum Contraceptive Use
Ongoing follow-up may help reduce adolescent mothers' risk of contraceptive discontinuation postpartum. Increasing use of long-acting methods also may help reduce their vulnerability to gaps in contraceptive use and discontinuation, which increase the risk of unintended pregnancy
Relationships of Pubertal Development Among Early Adolescents to Sexual and Nonsexual Risk Behaviors and Caregivers’ Parenting Behaviors
Using a school-based sample of Washington, DC, fifth graders (mean age 10.38, SD = 0.66) and their parents (N = 408), we examined associations of pubertal development with early adolescents' sexual and nonsexual risk behaviors and their caregivers' parenting behaviors; and of these risk behaviors with parenting behaviors. Youths reporting signs of pubertal development were more likely to engage in these risk behaviors than students reporting no s…
A Computerized Family Planning Counseling Aid
Computerized counseling aids like Smart Choices are in an early stage of development. Future research is warranted to develop tools that lead to more productive and individualized clinic visits and, ultimately, to more effective contraceptive use and reduced levels of unintended pregnancy
U.S. Women's Knowledge of Reproductive Biology
Psychology (17 works) · Demography (14 works) · Population (14 works) · Sociology (12 works) · Medicine (11 works) · Adolescent Sexual and Reproductive Health (10 works) · Demography (10 works) · Developmental psychology (10 works) · Family Dynamics and Relationships (10 works) · Family planning (10 works)