Biomedical subjects

Mary Bishop Stone

Publications and source records attributed to Mary Bishop Stone.

3 recordsLinked to original sources

PubMed2006

Indoor radon and lung cancer risk in connecticut and utah.

Radon is a well-established cause of lung cancer in miners. Residents of homes with high levels of radon are potentially also at risk. Although most individual studies of indoor radon have failed to demonstrate significant risks, results have generally been consistent with estimates from studies of miners. We studied 1474 incident lung cancer cases aged 40-79 yr in Connecticut, Utah, and southern Idaho. Population controls (n = 1811) were identified by random telephone screening and from lists of Medicare recipients, and were selected to be similar to cases on age, gender, and smoking 10 yr before diagnosis/interview using randomized recruitment. Complete residential histories and information on known lung cancer risk factors were obtained by in-person and telephone interviews. Radon was measured on multiple levels of past and current homes using 12-mo alpha-track etch detectors. Missing data were imputed using mean radon concentrations for informative subgroups of controls. Average radon exposures were lower than anticipated, with median values of 23 Bq/m3 in Connecticut and 45 Bq/m3 in Utah/southern Idaho. Overall, there was little association between time-weighted average radon exposures 5 to 25 yr prior to diagnosis/interview and lung cancer risk. The excess relative risk (ERR) associated with a 100-Bq/m3 increase in radon level was 0.002 (95% CI -0.21, 0.21) in the overall population, 0.134 (95% CI -0.23, 0.50) in Connecticut, and -0.112 (95% CI -0.34, 0.11) in Utah/Idaho. ERRs were higher for some subgroups less prone to misclassification, but there was no group with a statistically significant linear increase in risk. While results were consistent with the estimates from studies of miners, this study provides no evidence of an increased risk for lung cancer at the exposure levels observed.

Adult↗

PubMed2005

The UTAH VBAC Study.

BACKGROUND: In July 1999, The American College of Obstetricians and Gynecologists (ACOG) issued Practice Guideline number 5 on vaginal birth after cesarean section (VBAC) and trial of labor (TOL). This updated guideline recommends that a physician be immediately available during a TOL in the rare case of complications. We examined the effect this new guideline would have on physician's VBAC/TOL practices in Utah. OBJECTIVE: 1) Explore physician knowledge of ACOG Practice Guideline number 5; 2) Evaluate change in physician's VBAC practices in the previous 12 months; 3) Evaluate physician's ability to comply with ACOG Practice Guideline number 5 recommendations by rural, suburban, and urban location. METHODS: In spring 2001, we surveyed by mail all physicians practicing obstetrics in Utah. Questions included demographics, hospital data, VBAC/TOL practice patterns and awareness of ACOG Practice Guideline number 5. Physicians were classified as urban, suburban, or rural by their primary delivery hospital. RESULTS: We found 97% of obstetricians and 79% of family physicians were aware of ACOG Practice Guideline number 5. Forty-five percent of all physicians reported a decline in VBAC practices in the preceding 12 months. Urban physicians' use of VBAC/TOL decreased the least, followed by rural and suburban. Eighty-seven percent of physicians had C/S "immediately" available during TOL: urban physicians 100%, suburban 88%, and rural physicians 76%. Emergency C/S delivery was performed fastest at urban hospitals, slower at suburban, and slowest at rural hospitals. CONCLUSION: Physicians use of VBAC/TOL has changed. TOL is offered less by obstetrical providers in Utah and more repeat C/S are performed since 1999 when ACOG updated this policy guideline. This decline has been more noticeable in suburban and rural hospitals and is consistent with recent national trends. Many rural physicians are unable to comply with ACOG Practice Guideline number 5 recommendations.

Adult↗

PubMedDate not supplied

Obstetric care in family practice residencies: a 5-year follow-up survey.

BACKGROUND: The percentage of family physicians delivering babies decreased from 46% in 1978 to 32% in 1992. Some family practice leaders predicted that, by the turn of the century, training for family practice obstetrics would focus primarily on those planning to work in remote or rural settings. A 1993 study found three primary factors associated with an increased incidence of future maternity care. In 1997 the Residency Review Commission (RRC) stipulated that all family practice residencies have at least 1 family physician serve as an intrapartum attending physician for family practice resident deliveries. METHODS: Using an instrument similar to that used in 1993, we surveyed the directors of 462 family practice residencies in the United States. Sixty-four percent (295) of the program directors responded to one of two mailings. RESULTS: Compared with the survey published in 1993, program directors estimated a 16% increase in the number of residents who included obstetrics in their first practice after residency. Factors associated with increased obstetric participation included having only family physician faculty supervise uncomplicated deliveries and having family physician faculty who could perform other perinatal procedures. Programs that had 4 or more family physician faculty doing obstetrics and those that had more than 10 deliveries per month also produced more physicians who provided maternity care. Fifty-three percent of residencies that did not have family physician faculty attending deliveries before 1997 now meet this RRC requirement. CONCLUSIONS: This study shows that, according to their program directors' estimates, more family practice residents are including obstetrics in their first practice after residency compared with 5 years ago. The new RRC regulation was associated with more than 50% of previously noncompliant programs adding or retraining faculty who could attend resident deliveries within 12 months of the inception of the new policy.

Family Practice↗