Allen J Wilcox
Biographic Data
| ID | 5496437 |
|---|---|
| NAME | Allen J Wilcox |
| GIVEN NAMES | Allen J |
| FAMILY NAME | Wilcox |
| SIGNATURE | WILCOX A J |
| AFFILIATIONS | National Institute of Environmental Health Sciences |
| ORCID | 0000-0002-3376-1311 |
| VERIFIED | Yes |
| TOTAL WORKS | 14 |
| TOTAL CITATIONS | 34 |
| AUTHOR COUNT | 14 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 1985 |
| LATEST PUBLICATION YEAR | 2023 |
| H-INDEX | 3 |
The FDA Declares Levonorgestrel a Nonabortifacient—A 50-Year Saga Takes a Decisive Turn
This Viewpoint discusses recent judicial developments and the newly-enunciated FDA position that levonorgestrel is a nonabortifacient
Smoking and body weight
A Prospective Study of the Association Between Vigorous Physical Activity During Pregnancy and Length of Gestation and Birthweight
A Genetic Instrumental Variables Analysis of the Effects of Prenatal Smoking on Birth Weight
There is a large literature showing the detrimental effects of prenatal smoking on birth and childhood health outcomes. It is somewhat unclear though, whether these effects are causal or reflect other characteristics and choices by mothers who choose to smoke that may also affect child health outcomes or biased reporting of smoking. In this paper we use genetic markers that predict smoking behaviors as instruments to address the endogeneity of sm…
Terms in reproductive and perinatal epidemiology
This is the first of a two part glossary of terms used in reproductive and perinatal epidemiology
Terms in reproductive and perinatal epidemiology
This is the second of a two part glossary of terms used in reproductive and perinatal epidemiology. The purpose is to provide a reference for terms that are widely (if not always consistently) used in this field. While a glossary cannot resolve all these problems, it provides a point of reference for understanding them. Part 1 covered terms relevant mostly to events and conditions before birth. Part 2 emphasises terms used during the time around …
On the importance—and the unimportance— of birthweight
Birthweight is one of the most accessible and most misunderstood variables in epidemiology. A baby's weight at birth is strongly associated with mortality risk during the first year and, to a lesser degree, with developmental problems in childhood and the risk of various diseases in adulthood. Epidemiological analyses often regard birthweight as on the causal pathway to these health outcomes. Under this assumption of causality, birthweight is use…
Outcomes of 17,137 pregnancies in 2 urban areas of Ukraine
OBJECTIVES: Frequent terminations of pregnancy and high rates of fetal loss have been reported, but not confirmed, in the former eastern bloc. A census of pregnancies in Ukraine, a former eastern bloc country, was conducted to determine the rates of these events. METHODS: All pregnancies registered in 2 urban areas were enumerated. During a 19-month period between 1992 and 1994, 17,137 pregnancies and their outcomes were recorded. RESULTS: Sixty …
Errors in gestational age
OBJECTIVES: This study explored the extent of errors in gestational age as ascertained by last menstrual period. METHODS: More than 1.5 million birth records (covering the years 1967-1994) from the population-based Medical Birth Registry of Norway were used to study variation in gestational age within strata of birthweight. RESULTS: Within 100-g strata of birthweight, it was found that the observed gestational age distribution could be divided in…
Harsh social conditions and perinatal survival
OBJECTIVES. The hypothesis was tested that unfavorable social conditions are associated with poor perinatal survival through direct effects on pregnancy or, more indirectly, through effects on mothers born under such conditions. The occupation of Norway by Nazi Germany was used as a period of social hardship. METHODS. Data from Norwegian vital statistics and the Medical Birth Registry were used to describe perinatal mortality during World War II …
Birth weight and perinatal mortality
BACKGROUND. The strong association between birth weight and perinatal mortality is due both to gestational age and to factors unrelated to gestational age. Conventional analysis obscures these separate contributions to perinatal mortality, and overemphasizes the role of birth weight. An alternative approach is used here to separate gestational age from other factors. METHODS. Data are from 400,000 singleton births in the Norwegian Medical Birth R…
Maternal blood lead
Cigarette Smoking Associated with Delayed Conception
We conducted an epidemiologic study to test the hypothesis that women who smoke have reduced fertility. Data on smoking history and number of noncontracepting cycles until conception were collected from 678 pregnant women. Thirty-eight percent of nonsmokers conceived in their first cycle compared with 28% of smokers. Smokers were 3.4 times more likely to have taken greater than a year to conceive compared with nonsmokers. After adjusting for pote…
Cancer risk in adulthood from early life exposure to parents' smoking
We obtained data on smoking by parents from 438 cancer cases and 470 controls to investigate whether cancer risk in adult life is related to transplacental or childhood exposure to cigarette smoke. Cancer cases were between ages 15 and 59 at time of diagnosis. All sites but basal cell cancer of the skin were included. Cancer risk was increased 50 per cent among offspring of men who smoked. Increased risk associated with father's smoking was not e…
Birth weight and perinatal mortality
BACKGROUND. The strong association between birth weight and perinatal mortality is due both to gestational age and to factors unrelated to gestational age. Conventional analysis obscures these separate contributions to perinatal mortality, and overemphasizes the role of birth weight. An alternative approach is used here to separate gestational age from other factors. METHODS. Data are from 400,000 singleton births in the Norwegian Medical Birth R…
Errors in gestational age
OBJECTIVES: This study explored the extent of errors in gestational age as ascertained by last menstrual period. METHODS: More than 1.5 million birth records (covering the years 1967-1994) from the population-based Medical Birth Registry of Norway were used to study variation in gestational age within strata of birthweight. RESULTS: Within 100-g strata of birthweight, it was found that the observed gestational age distribution could be divided in…
Cancer risk in adulthood from early life exposure to parents' smoking
We obtained data on smoking by parents from 438 cancer cases and 470 controls to investigate whether cancer risk in adult life is related to transplacental or childhood exposure to cigarette smoke. Cancer cases were between ages 15 and 59 at time of diagnosis. All sites but basal cell cancer of the skin were included. Cancer risk was increased 50 per cent among offspring of men who smoked. Increased risk associated with father's smoking was not e…
A Genetic Instrumental Variables Analysis of the Effects of Prenatal Smoking on Birth Weight
There is a large literature showing the detrimental effects of prenatal smoking on birth and childhood health outcomes. It is somewhat unclear though, whether these effects are causal or reflect other characteristics and choices by mothers who choose to smoke that may also affect child health outcomes or biased reporting of smoking. In this paper we use genetic markers that predict smoking behaviors as instruments to address the endogeneity of sm…
Terms in reproductive and perinatal epidemiology
This is the second of a two part glossary of terms used in reproductive and perinatal epidemiology. The purpose is to provide a reference for terms that are widely (if not always consistently) used in this field. While a glossary cannot resolve all these problems, it provides a point of reference for understanding them. Part 1 covered terms relevant mostly to events and conditions before birth. Part 2 emphasises terms used during the time around …
Harsh social conditions and perinatal survival
OBJECTIVES. The hypothesis was tested that unfavorable social conditions are associated with poor perinatal survival through direct effects on pregnancy or, more indirectly, through effects on mothers born under such conditions. The occupation of Norway by Nazi Germany was used as a period of social hardship. METHODS. Data from Norwegian vital statistics and the Medical Birth Registry were used to describe perinatal mortality during World War II …
Maternal blood lead
Cancer risk in adulthood from early life exposure to parents' smoking
We obtained data on smoking by parents from 438 cancer cases and 470 controls to investigate whether cancer risk in adult life is related to transplacental or childhood exposure to cigarette smoke. Cancer cases were between ages 15 and 59 at time of diagnosis. All sites but basal cell cancer of the skin were included. Cancer risk was increased 50 per cent among offspring of men who smoked. Increased risk associated with father's smoking was not e…
Cigarette Smoking Associated with Delayed Conception
We conducted an epidemiologic study to test the hypothesis that women who smoke have reduced fertility. Data on smoking history and number of noncontracepting cycles until conception were collected from 678 pregnant women. Thirty-eight percent of nonsmokers conceived in their first cycle compared with 28% of smokers. Smokers were 3.4 times more likely to have taken greater than a year to conceive compared with nonsmokers. After adjusting for pote…
Maternal blood lead
Birth weight and perinatal mortality
BACKGROUND. The strong association between birth weight and perinatal mortality is due both to gestational age and to factors unrelated to gestational age. Conventional analysis obscures these separate contributions to perinatal mortality, and overemphasizes the role of birth weight. An alternative approach is used here to separate gestational age from other factors. METHODS. Data are from 400,000 singleton births in the Norwegian Medical Birth R…
Harsh social conditions and perinatal survival
OBJECTIVES. The hypothesis was tested that unfavorable social conditions are associated with poor perinatal survival through direct effects on pregnancy or, more indirectly, through effects on mothers born under such conditions. The occupation of Norway by Nazi Germany was used as a period of social hardship. METHODS. Data from Norwegian vital statistics and the Medical Birth Registry were used to describe perinatal mortality during World War II …
Outcomes of 17,137 pregnancies in 2 urban areas of Ukraine
OBJECTIVES: Frequent terminations of pregnancy and high rates of fetal loss have been reported, but not confirmed, in the former eastern bloc. A census of pregnancies in Ukraine, a former eastern bloc country, was conducted to determine the rates of these events. METHODS: All pregnancies registered in 2 urban areas were enumerated. During a 19-month period between 1992 and 1994, 17,137 pregnancies and their outcomes were recorded. RESULTS: Sixty …
Errors in gestational age
OBJECTIVES: This study explored the extent of errors in gestational age as ascertained by last menstrual period. METHODS: More than 1.5 million birth records (covering the years 1967-1994) from the population-based Medical Birth Registry of Norway were used to study variation in gestational age within strata of birthweight. RESULTS: Within 100-g strata of birthweight, it was found that the observed gestational age distribution could be divided in…
On the importance—and the unimportance— of birthweight
Birthweight is one of the most accessible and most misunderstood variables in epidemiology. A baby's weight at birth is strongly associated with mortality risk during the first year and, to a lesser degree, with developmental problems in childhood and the risk of various diseases in adulthood. Epidemiological analyses often regard birthweight as on the causal pathway to these health outcomes. Under this assumption of causality, birthweight is use…
Terms in reproductive and perinatal epidemiology
This is the first of a two part glossary of terms used in reproductive and perinatal epidemiology
Terms in reproductive and perinatal epidemiology
This is the second of a two part glossary of terms used in reproductive and perinatal epidemiology. The purpose is to provide a reference for terms that are widely (if not always consistently) used in this field. While a glossary cannot resolve all these problems, it provides a point of reference for understanding them. Part 1 covered terms relevant mostly to events and conditions before birth. Part 2 emphasises terms used during the time around …
Smoking and body weight
A Prospective Study of the Association Between Vigorous Physical Activity During Pregnancy and Length of Gestation and Birthweight
A Genetic Instrumental Variables Analysis of the Effects of Prenatal Smoking on Birth Weight
There is a large literature showing the detrimental effects of prenatal smoking on birth and childhood health outcomes. It is somewhat unclear though, whether these effects are causal or reflect other characteristics and choices by mothers who choose to smoke that may also affect child health outcomes or biased reporting of smoking. In this paper we use genetic markers that predict smoking behaviors as instruments to address the endogeneity of sm…
The FDA Declares Levonorgestrel a Nonabortifacient—A 50-Year Saga Takes a Decisive Turn
This Viewpoint discusses recent judicial developments and the newly-enunciated FDA position that levonorgestrel is a nonabortifacient
Medicine (14 works) · Pregnancy (9 works) · Demography (7 works) · Environmental health (7 works) · Birth, Development, and Health (5 works) · Obstetrics (5 works) · Population (5 works) · Pregnancy and preeclampsia studies (5 works) · Birth weight (4 works) · Cancer Risks and Factors (4 works)