Search PubMed⌕ Search

Biomedical subjects

H E Peters

Publications and source records attributed to H E Peters.

15 recordsLinked to original sources
PubMed2001

Magnetic resonance cholangiopancreatography (MRCP) of intraductal papillary-mucinous neoplasm (IPMN) of the pancreas: case report.

The intraductal papillary-mucinous neoplasm (IPMN) is the rarest of the cystic pancreatic tumors. Endoscopic retrograde cholangiopancreatography (ERCP) is currently the gold standard for evaluating IPMN's and can demonstrate dilatation of the main duct or side branches, mural nodules, filling defects, and communication between the tumor and the main pancreatic duct. Recent literature has shown that MRCP may be more sensitive and specific in the diagnosis of IPMN In this case report, we present a patient with IPMN of the pancreas where MRCP was superior to ERCP in characterizing the tumor.

Cholangiopancreatography, Endoscopic Retrograde↗
PubMed2000

Lung cancer in New South Wales: current trends and the influence of age and sex.

OBJECTIVE: To examine the effects of time, sex and age at diagnosis on lung cancer incidence rates and the distribution of the histological types of lung cancer in New South Wales. DESIGN AND SETTING: Retrospective analysis of data from the NSW Cancer Registry and Australian Bureau of Statistics population data for NSW for 1985-1995. MAIN OUTCOME MEASURES: Trends in lung cancer incidence rates between 1985 and 1995 for men and women aged over 30 years; changes in incidence rates within age groups; and incidence rates of histological subtypes relative to sex and age. RESULTS: The incidence of lung cancer in men aged 40-80 years fell, while that in women aged over 65 rose. Rates were stable in younger women and older men. Incidence rates in men aged 40-60 years fell by 40%-60%. Were it not for the reduction in incidence rates in men between 1985 and 1995, the number of male lung cancer cases in 1995 would have been greater by 389 (95% CI, 362-415). In women, increasing incidence rates were responsible for an extra 242 cases (95% CI, 232-253) in 1995. Adenocarcinoma comprised a greater percentage of lung cancer cases in younger people, while squamous-cell carcinoma increases steadily with age in both men and women. Women with lung cancer are less likely to have squamous-cell carcinoma (25% for women v. 40% for men) and therefore more likely than men to have adenocarcinoma (35% of new female cases v. 26% for men) or small-cell lung cancer (24% v. 19%). CONCLUSIONS: Increased smoking cessation has seen a halving of lung cancer rates in middle-aged men. Whether this represents delayed or prevented cases is uncertain. The distribution of histological subtypes of lung cancer in women is different from that in men, and it is not clear whether this difference is hormone-dependent or related to historical patterns of smoking.

Adenocarcinoma↗
PubMed1999

Incomplete reporting of men's fertility in the United States and Britain: a research note.

We evaluate men's retrospective fertility histories from the British Household Panel Survey and the U.S. Panel Study of Income Dynamics (PSID). Further, we analyze the PSID men's panel-updated fertility histories for their possible superiority over retrospective collection. One third to one half of men's nonmarital births and births within previous marriages are missed in estimates from retrospective histories. Differential survey underrepresentation of previously married men compared with previously married women accounts for a substantial proportion of the deficits in previous-marriage fertility. More recent retrospective histories and panel-updated fertility histories improve reporting completeness, primarily by reducing the proportion of marital births from unions that are no longer intact at the survey date.

Bias↗
PubMed1998

The impact of child support on cognitive outcomes of young children.

We use the National Longitudinal Survey of Youth-Child data to address three questions. First, does the receipt of child support have beneficial effects for children with absent fathers apart from increasing income? Second, do the effects of child support differ when child-support awards and payments are made cooperatively as opposed to being court ordered? Third, are any positive effects of child support solely a product of unmeasured differences among fathers and families? Controlling for the socioeconomic characteristics of the child and family, we find some evidence that receipt of child support has a positive impact on children's cognitive test scores over and above its contribution to total income. However, the effects vary by test, by race, and by reason for father's absence. Our results also indicate that the distinction between cooperative and noncooperative awards is important. Finally, our instrumental variables estimates show that the effects of child support persist after we control for unobserved characteristics of fathers and families.

Achievement↗
PubMed1996

Economic incentives for financial and residential independence.

In this paper we examine the impact of the resource of children and of their parents on the children's transition to residential and financial independence. Previous studies of this transition focused primarily on the impact of family structure and parent-child relationships on the decision to leave home, but much less in known about the role of economic factors in the transition to independence. Using data from the Panel Study of Income Dynamics (PSID) for the period 1968-1988, we estimate discrete-hazard models of the probability of achieving residential and financial independence. We find that the child's wage opportunities and the parents' income are important determinants of establishing independence. The effect of parental income changes with the child's age. We also find some evidence that federal tax policy influences the decision to become independent, although the magnitude of this effect is quite small.

Activities of Daily Living↗
PubMed1995

The Easterlin effect.

"The Easterlin effect posits cyclical changes in demographic and social behavior as the result of fluctuations in birth rates and cohort size during the post-World War II period.... The Easterlin effect has generated a large literature in the several decades since it was first proposed. Our review of the empirical studies notes the diversity of support across behaviors, time periods, and nations.... Our review emphasizes both the contingent nature of the Easterlin effect and the way in which conditions have changed in recent decades to reduce the salience of cohort size for social and demographic behavior."

Behavior↗
PubMed1993

Enforcing divorce settlements: evidence from child support compliance and award modifications.

This paper uses an implicit contracting framework to understand the dynamic nature of divorce settlements and to analyze the determinants of noncompliance with child support awards. In addition to the standard economic variables that affect the noncustodial parent's (NCP's) ability to pay child support, our approach focuses on factors that may affect the NCP's desire to pay, such as the ongoing relationship between the two parents and between the NCP and the children. We also examine the "state-contingent" nature of child support payments and explore the factors that lead to modifications in child support agreements. Using a longitudinal data set collected by the Stanford Child Custody Project, the empirical analysis provides documentation that compliance by noncustodial fathers can vary substantially from month to month. In addition, we find that even within a short period after divorce, a substantial minority of parents agree to make informal modifications to their divorce settlement in response to changes in economic circumstances and in custodial arrangements.

California↗
PubMed1978

Retained intrahepatic stones. Use of the U tube during repeated nonoperative stone extractions.

Of 355 patients undergoing nonoperative extraction procedures for retained bile duct stones, 61 patients had intrahepatic calculi. In seven of these patients with multiple intrahepatic stones and two of them with additional hepatic duct strictures.trahepatic stones, a U tube was placed. Insertion of a U tube is particularly useful if multiple sittings are required for intrahepatic stone removal. The U tube can be inserted postoperatively and permits ease of operation from two sides, particulary if stricture dilation is required before stone removal. With the use of the U tube, inadvertent removal has not occurred and patients are able to work and shower between extraction procedures. Indwelling U tubes are readily replaced over a guide wire. This technique was used with good success and for long periods of time in seven patients, all with multiple intrahepatic stones and two of them with additional hepatic duct strictures.

Bile Ducts, Intrahepatic↗
PubMed1975

Enzymatic dissolution of phytobezoars.

A review of phytobezoars is presented, emphasizing medical treatment using enzymatic dissolution for bezoar located in the gastric pouch. Clinical and in vitro studies show the efficacy of both papain and cellulase, and it is suggested that, since each acts on a different component of the bezoar, they be administered in combination. There were no complications with this treatment in the patients reported in this series.

Bezoars↗
PubMedDate not supplied

Omphalocele.

Explore the source record for details and available documents.

Hernia, Umbilical↗