Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 45
Filtrar
Más filtros

Banco de datos
País/Región como asunto
Tipo del documento
Intervalo de año de publicación
1.
Tomography ; 6(2): 118-128, 2020 06.
Artículo en Inglés | MEDLINE | ID: mdl-32548288

RESUMEN

Radiomic features are being increasingly studied for clinical applications. We aimed to assess the agreement among radiomic features when computed by several groups by using different software packages under very tightly controlled conditions, which included standardized feature definitions and common image data sets. Ten sites (9 from the NCI's Quantitative Imaging Network] positron emission tomography-computed tomography working group plus one site from outside that group) participated in this project. Nine common quantitative imaging features were selected for comparison including features that describe morphology, intensity, shape, and texture. The common image data sets were: three 3D digital reference objects (DROs) and 10 patient image scans from the Lung Image Database Consortium data set using a specific lesion in each scan. Each object (DRO or lesion) was accompanied by an already-defined volume of interest, from which the features were calculated. Feature values for each object (DRO or lesion) were reported. The coefficient of variation (CV), expressed as a percentage, was calculated across software packages for each feature on each object. Thirteen sets of results were obtained for the DROs and patient data sets. Five of the 9 features showed excellent agreement with CV < 1%; 1 feature had moderate agreement (CV < 10%), and 3 features had larger variations (CV ≥ 10%) even after attempts at harmonization of feature calculations. This work highlights the value of feature definition standardization as well as the need to further clarify definitions for some features.


Asunto(s)
Procesamiento de Imagen Asistido por Computador , Tomografía Computarizada por Tomografía de Emisión de Positrones , Radiometría , Programas Informáticos , Humanos , Neoplasias/diagnóstico por imagen , Radiometría/normas , Estándares de Referencia
2.
Neurology ; 54(6): 1385-7, 2000 Mar 28.
Artículo en Inglés | MEDLINE | ID: mdl-10746618

RESUMEN

To reassess the independent risk factors for lacunar stroke and to clarify the role of potential embolic sources, we conducted a case-control study using transesophageal echocardiography and duplex ultrasonography. Among 62 consecutive patients with their first lacunar stroke and 202 normal controls, we found that hypertension (p < 0.001), smoking (p = 0.001), and aortic arch atheroma (p = 0.006) were independently associated with an increased risk of lacunar stroke. Whether proximal aortic arch atheroma is mechanistically associated with lacunar stroke or merely coexistent is uncertain.


Asunto(s)
Ecocardiografía Transesofágica , Accidente Cerebrovascular/diagnóstico por imagen , Anciano , Estudios de Casos y Controles , Femenino , Humanos , Masculino , Persona de Mediana Edad , Factores de Riesgo , Tomografía Computarizada por Rayos X
3.
Am J Cardiol ; 74(6): 596-9, 1994 Sep 15.
Artículo en Inglés | MEDLINE | ID: mdl-8074044

RESUMEN

Patent foramen ovale (PFO) may be a risk factor for ischemic stroke in young patients. The aim of this study was to assess the importance of PFO in subjects with a wider age range using patient-control methodology. Transesophageal contrast echocardiography and carotid imaging were performed in 220 consecutive patients with cerebral ischemia (mean age 66 +/- 13 years) and in 202 community-based control subjects (mean age 64 +/- 11 years). Of patients with stroke, 35 (16%) had PFO compared with 31 control subjects (15%) (p = 0.98). Analysis of PFO prevalence by age did not show a significant difference between patients and controls subjects in the age groups < 50 years (27% vs 11%; p = 0.33), 50 to 69 years (17% vs 15%; p = 0.78), and > or = 70 years (12% vs 17%; p = 0.43). However, the group aged < 50 years was relatively small (26 cases, 19 controls). No significant difference in PFO prevalence was detected between patients with cryptogenic stroke (20%), noncryptogenic stroke (14%), and control subjects (15%). These results suggest that PFO is not a risk factor for cerebral ischemia in subjects aged > 50 years, which would have major implications for the investigation and management of stroke patients in this age group. Longitudinal studies are now required to assess the incidence of stroke in symptom-free patients with PFO.


Asunto(s)
Isquemia Encefálica/etiología , Defectos del Tabique Interatrial/complicaciones , Factores de Edad , Anciano , Distribución de Chi-Cuadrado , Femenino , Defectos del Tabique Interatrial/diagnóstico por imagen , Humanos , Masculino , Variaciones Dependientes del Observador , Factores de Riesgo , Ultrasonografía
4.
Am J Cardiol ; 78(4): 425-9, 1996 Aug 15.
Artículo en Inglés | MEDLINE | ID: mdl-8752187

RESUMEN

Nonrheumatic atrial fibrillation (AF) frequently coexists with other risk factors for cerebral ischemia. This study was originally designed to determine which combinations of clinical and echocardiographic abnormalities were most closely associated with the risk of cerebral ischemic events. Patients with cerebral ischemic events (n = 214) and community-based control subjects (n = 201) underwent transesophageal echocardiography and carotid artery imaging. Adjusted odds ratios (ORs) were determined using multiple logistic regression analysis. Independent risk factors for cerebral ischemia included diabetes, carotid stenosis, aortic sclerosis, left ventricular dysfunction, left ventricular hypertrophy, left atrial (LA) spontaneous contrast, and proximal aortic atheroma. Nonrheumatic AF in combination with LA spontaneous contrast and LA enlargement showed a strong association with cerebral ischemic events (OR 33.7 [95% confidence interval 4.53 to 251]). In subjects with sinus rhythm or nonrheumatic AF, LA enlargement was not associated with an increased risk of cerebral ischemic events in the absence of LA spontaneous contrast. However, only 2 patients and 1 control subject had nonrheumatic AF without LA spontaneous contrast or LA enlargement. Therefore, study of a larger number of subjects is required to address the issue of whether nonrheumatic AF itself carries increased risk. The combination of nonrheumatic AF with LA spontaneous contrast is a potent risk factor for cerebral ischemia. Ascertaining the risk factor in nonrheumatic AF requires adequate examination for underlying cardiac, aortic, and carotid vascular disease. Transesophageal echocardiography may contribute to this assessment.


Asunto(s)
Fibrilación Atrial/complicaciones , Trastornos Cerebrovasculares/etiología , Medios de Contraste , Ecocardiografía Transesofágica , Enfermedades de la Aorta/complicaciones , Arteriosclerosis/complicaciones , Fibrilación Atrial/diagnóstico por imagen , Función del Atrio Izquierdo , Isquemia Encefálica/etiología , Cardiomegalia/complicaciones , Arterias Carótidas/diagnóstico por imagen , Estenosis Carotídea/complicaciones , Constricción Patológica/complicaciones , Complicaciones de la Diabetes , Femenino , Atrios Cardíacos/diagnóstico por imagen , Humanos , Hipertrofia Ventricular Izquierda/complicaciones , Modelos Logísticos , Masculino , Persona de Mediana Edad , Oportunidad Relativa , Factores de Riesgo , Disfunción Ventricular Izquierda/complicaciones
5.
Am J Vet Res ; 37(6): 731-3, 1976 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-132881

RESUMEN

In late October, 1974, Staphylococcus aureus postoperative wound infection was recorded in a nonhuman primate (Macaca mulatta) which had recently undergone surgical operation. Infection in a second monkey appeared approximately 2 weeks later, and a clustering of 6 cases appeared over the next 3-week period. The clinical spectrum included septicemia in 2 monkeys and skin infection at the surgical incision site of several others. Investigation revealed a uniform and consistent association of a phage group II S aureus strain characterized as 3A/55/71. This strain was also found to be enzootic among other postoperative monkeys sharing or having shared a common postsurgical care unit with infected monkeys. Epizootiologic studies indicated that this unusually virulent S aureus strain probably was introduced by an infected monkey which underwent surgery earlier in the month and that additional monkeys became infected by animal-to-animal transmission. After appropriate control sanitary measures were instituted, no new infections occurred.


Asunto(s)
Enfermedades de los Monos/epidemiología , Infecciones Estafilocócicas/veterinaria , Infección de la Herida Quirúrgica/veterinaria , Animales , Farmacorresistencia Microbiana , Haplorrinos , Macaca , Enfermedades de los Monos/microbiología , Infecciones Estafilocócicas/epidemiología , Infecciones Estafilocócicas/microbiología , Fagos de Staphylococcus/aislamiento & purificación , Staphylococcus aureus/efectos de los fármacos , Staphylococcus aureus/aislamiento & purificación , Infección de la Herida Quirúrgica/epidemiología , Infección de la Herida Quirúrgica/microbiología
6.
Quintessence Int ; 24(2): 131-3, 1993 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-8511264

RESUMEN

The purpose of the study was to evaluate whether the clinical effectiveness of pit and fissure sealant was increased (as demonstrated by an increased retention rate) when a bonding agent was used prior to the placement of the sealant. Two pit and fissure sealants, Concise Light Cured White Sealant and Prisma Shield Light Cured Sealant, were placed in vivo with and without the use of the bonding agents, Scotchbond 2 and Prisma Universal Bond. After 2 years, 55% of the sample was available for recall. The retention rates for the sealants were 77% for Concise with Scotchbond 2, 84% for Concise with no bonding agent, 77% for Prisma Shield with Universal Bond, and 77% for Prisma Shield with no bonding agent. Results of this study indicated that the use of a bonding agent prior to the application of a pit and fissure sealant does not increase the retention rate.


Asunto(s)
Restauración Dental Permanente/métodos , Recubrimientos Dentinarios , Selladores de Fosas y Fisuras , Cementos de Resina , Bisfenol A Glicidil Metacrilato , Resinas Compuestas , Fisuras Dentales/terapia , Estudios de Seguimiento , Humanos , Análisis de Regresión
7.
J Genet Psychol ; 156(2): 153-66, 1995 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-7798075

RESUMEN

The influences of goal-related actions and goal information on children's try-and-want perceptions were investigated with an action-perception approach (i.e., Heider, 1958). Kindergartners, second graders, and fifth graders heard stories that depicted actors engaged in one action, that same action three times, or three equifinal actions to attain a positive or negative goal. The children rated how much actors tried and wanted to attain the goal. The findings indicate that the actors who engaged in only one action were perceived to have tried and wanted the least, and the actors who engaged in equifinal actions were perceived to have tried and wanted the most. The actors who engaged in one action were not significantly differentiated from those who engaged in repetitive actions. However, the actors who engaged in repetitive actions were significantly differentiated from those who engaged in equifinal actions. For try ratings only, the children made all expected differentiations of actors by goal-related action in negative goal conditions, whereas fewer differentiations were made of actors in positive goal conditions. Age-related findings indicate that only younger children perceived that the actors who pursued positive goals tried and wanted more than those who pursued negative goals.


Asunto(s)
Conducta Infantil , Objetivos , Percepción , Niño , Preescolar , Femenino , Humanos , Juicio , Masculino , Psicología Infantil
8.
J Genet Psychol ; 162(2): 154-66, 2001 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-11432601

RESUMEN

The influences of different action-outcome scenarios on children's evaluative judgments and inferences of outcome intentionality were assessed. One hundred forty-five kindergartners, 2nd graders, and 4th graders heard 4 stories about child actors who engaged in 1 action or 3 equifinal actions and caused a positive or negative outcome. The stories made no mention of the actors' anticipated outcome so that we could assess the children's inferences of whether the actors wanted and had tried to cause the outcome. Children also rated their liking for the actors and the actors' morality. Children's moral and liking judgments were not significantly differentiated by action condition. However, actors who caused positive outcomes received favorable liking and moral judgments, and actors who caused negative outcomes received neutral liking and moral judgments. Children's intentionality inferences varied by the actors' actions and were moderated by outcome valence. The authors discuss children's apparent use of the valence rule when inferring intentionality and their reluctance to judge harshly actors who cause negative outcomes when not privy to the actors' intentions.


Asunto(s)
Juicio , Principios Morales , Motivación , Percepción Social , Conducta Infantil/psicología , Preescolar , Femenino , Humanos , Masculino , Psicología Infantil
9.
J Psychol ; 130(5): 571-83, 1996 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-8865629

RESUMEN

An action perception approach (i.e., Heider, 1958) was used to investigate the influences of qualitatively different goal-related actions on 2nd- and 5th-grade children's and college students' perceptions of actors' effort expenditure (i.e., trying) and goal desire (i.e., wanting). Actors performed three repetitive actions or three equifinal actions within 2 reward conditions (offer of reward or no reward, for attempting to attain a prosocial goal). At each age level, perceptions of effort and want varied significantly by goal-related actions, whereas reward information did not emerge as an influential factor in differentiating perceptions of effort and want. Age-related findings suggested that, compared with the college students, the children overattributed trying and wanting to the actors. In the repetitive-actions condition, both 2nd and 5th graders gave significantly higher effort and want ratings than college students did. In the equifinal-actions condition, 2nd and 5th graders gave significantly higher effort ratings than college students did.


Asunto(s)
Objetivos , Motivación , Desarrollo de la Personalidad , Esfuerzo Físico , Recompensa , Adulto , Niño , Humanos , Control Interno-Externo , Determinación de la Personalidad , Percepción Social , Estudiantes/psicología
10.
J Psychol ; 133(2): 194-204, 1999 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-10188266

RESUMEN

Preschoolers, 1st graders, and 4th graders were shown line drawings that depicted 2 prosocial and 2 aggressive behaviors. Black actors or White actors were depicted in the scenarios, and a brief description of each behavior was read to the child. For each scenario, children rated their liking for the actor and the morality of the actor's behavior. Findings indicated that children at each age level significantly differentiated the actors by behavior valence for moral and liking judgements. However, the moral judgements of White preschoolers were more differentiated by behavior valence than the judgments of Black preschoolers. Also, there was more differentiation of actors by behavior valence for liking judgments as the age levels of the children increased. Black actors received more negative moral judgments than did White actors only at the preschool level.


Asunto(s)
Negro o Afroamericano/psicología , Conducta Infantil/psicología , Juicio , Principios Morales , Población Blanca/psicología , Niño , Preescolar , Comparación Transcultural , Femenino , Humanos , Masculino
13.
Fam Plann Perspect ; 21(3): 103-9, 1989.
Artículo en Inglés | MEDLINE | ID: mdl-2668019

RESUMEN

It is estimated that only about half of all abortions occurring during the period covered by the 1982 National Survey of Family Growth were actually reported in the survey; thus, contraceptive failure rates calculated from these data are almost certainly inaccurate. An attempt to correct for the underreporting of abortion indicates that actual 12-month use-failure rates are more than one-third higher than those calculated without taking abortion underreporting into account, with rates ranging from six percent for the pill to 14-16 percent for the condom, diaphragm and rhythm and to 26 percent for spermicides. Patterns of contraceptive failure are similar to those found in earlier studies.


Asunto(s)
Anticonceptivos , Dispositivos Anticonceptivos , Embarazo , Adulto , Recolección de Datos , Etnicidad , Femenino , Humanos , Modelos Estadísticos , National Center for Health Statistics, U.S. , Pobreza , Estados Unidos
14.
Baillieres Clin Neurol ; 4(2): 207-20, 1995 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-7496618

RESUMEN

The availability of the sophisticated imaging techniques of transoesophageal echocardiography and epiaortic ultrasound scanning have drawn attention to the ascending aorta and aortic arch as a potential source of embolic stroke. Several studies have shown an association between atheroma in this region and cerebral ischaemic events. Although aortic atheroma is associated with vascular disease in other arterial territories, two large controlled studies have shown it to be a risk factor for stroke, independently of other major risk factors such as carotid vascular disease, cardiac disease and hypertension. In observational and case-control studies, the risk of stroke is higher in the presence of certain echocardiographic appearances of atheromatous plaque--these include plaque thickness of > 4-5 mm, surface irregularity suggesting plaque ulceration and mobile elements suggesting superimposed thrombus. However, longitudinal studies are required to evaluate the prognostic significance of such findings. Several therapeutic options have been described or suggested in patients with and without stroke in whom aortic atheroma is demonstrated, but the optimal management of such patients is yet to be determined in prospective controlled trials.


Asunto(s)
Enfermedades de la Aorta/complicaciones , Arteriosclerosis/complicaciones , Embolia y Trombosis Intracraneal/etiología , Aorta Torácica , Enfermedades de la Aorta/diagnóstico por imagen , Arteriosclerosis/diagnóstico por imagen , Estudios de Casos y Controles , Ecocardiografía Transesofágica , Humanos , Embolia y Trombosis Intracraneal/prevención & control , Factores de Riesgo
15.
Clin Exp Hypertens ; 19(5-6): 531-41, 1997.
Artículo en Inglés | MEDLINE | ID: mdl-9247736

RESUMEN

It has been proposed that cardiovascular hypertrophy precedes and contributes to the development of genetic hypertension. In a genetically segregating population we determined whether susceptibility to high blood pressure was associated with cardiovascular structural abnormalities in youth. In 9-week old male F2 rats derived from a cross of spontaneously hypertensive rats (SHR) and inbred normotensive Donryu (DRY) rats we determined left ventricular mass (LVM) by echocardiography and the media-lumen ratio (MLR) of mesenteric resistance vessels by biopsy. Direct mean arterial pressure was measured in the same rats at 20 weeks of age. The ranges of LVM and MLR in young F2 rats encompassed values seen SHR and DRY at this age. However, no correlation was observed between LVM or MLR and subsequent blood pressures at 20 weeks of age. The blood pressure of F2 rats with cardiovascular structural phenotypes within the SHR range was no higher than the remainder of the F2 population. These studies do not support the hypothesis that hypertrophy of the heart or mesenteric resistance vessels confer susceptibility to the development of genetic hypertension.


Asunto(s)
Cardiomegalia/complicaciones , Hipertensión/etiología , Hipertensión/genética , Animales , Cardiomegalia/genética , Cardiomegalia/patología , Cruzamientos Genéticos , Modelos Animales de Enfermedad , Femenino , Ventrículos Cardíacos/patología , Hipertensión/patología , Masculino , Arterias Mesentéricas/patología , Ratas , Ratas Endogámicas SHR
16.
Demography ; 16(2): 209-17, 1979 May.
Artículo en Inglés | MEDLINE | ID: mdl-456702

RESUMEN

Catholic and non-Catholic fertility during the post-World War II period are compared in this paper. Evidence accumulated across five sample surveys of fertility in the United States, which were conducted at five-year intervals from 1955 through 1975, forms the basis for the analysis; both cohort and period measures are employed. Starting from a situation where Catholic fertility was very little higher than that of non-Catholics, it is shown that the differential increased markedly during the baby boom and then declined to a point where the two trends nearly come together in the mid-1970s. Interpretation of the recent convergence in the light of various theories that have been put forward to explain the differential suggests that it will be an enduring phenomenon.


Asunto(s)
Catolicismo , Fertilidad , Aculturación , Adolescente , Adulto , Servicios de Planificación Familiar , Femenino , Humanos , Estados Unidos
17.
Fam Plann Perspect ; 24(1): 12-9, 1992.
Artículo en Inglés | MEDLINE | ID: mdl-1601121

RESUMEN

Analysis of data from the 1988 National Survey of Family Growth--corrected for the underreporting of abortion--reveals that contraceptive failure during the first year of use remains a serious problem in the United States, contributing substantially to unintended pregnancy. The pill continues to be the most effective reversible method for which data were available (8% of users accidentally became pregnant during the first year of use), followed by the condom (15%). Periodic abstinence is the method most likely to fail (26%), but accidental pregnancy is also relatively common among women using spermicides (25%). Failure rates vary more by user characteristics such as age, marital status and poverty status than by method, suggesting the extent to which failure results from improper and irregular use rather than from the inherent limitations of the method.


PIP: Use-effectiveness of contraceptives during the 1st 12 months of use is measured in this study based on respondents' observation period of January 1984-88 in the 1988 National Survey of Family Growth (NSFG)--IV. Best fitting models that estimate the proportions of contraceptive failures (method used and duration) among subgroups of women were determined by log linear hazard analysis. Correction procedures were performed to compensate for underreporting of abortion using the 1987 Alan Guttmacher Institute (AGI) survey data. The effect was substantial and created difficulties. The limitations of the correction procedure are that the time frame is not exactly the same between the AGI and the NSFG, and few adjustments have been made for the changes in contraceptive practice since 1984. Abortions may have been concealed in the reporting to the NSFG, and the failure rates may be biased downward. The results are topically discussed in terms of method-specific failure rates, the effects of characteristics, and the comparison between 1982 and 1988 results of the NSFG. One of the conclusions reached was that US contraceptive failure rates are much higher than necessary. For example, women who used the pill in the 1980s had a failure rate of 80/1000, when it should be 1/1000. Perfect use of condoms yields an estimated failure of 20/1000 vs. the actual rate of 150/1000. The comparison of 1982 and 1988 data that contraceptive failure rates for the pill and periodic abstinence have risen. The changes in user characteristics do not account very much for the differences in the rates. Plausible interpretations are that the 1982 periodic abstinence failure rates may be too low, and that unknown pill user bias accounts for the difference. Failure rates by method show that oral contraceptive users are the least likely to experience an unintended pregnancy, followed by condom and diaphragm users. The highest failure rates were found among users of periodic abstinence and spermicides. In the analysis of characteristics, failure rates in general are more common among disadvantaged women. Those most likely to experience contraceptive failure are younger unmarried women who are poor and from a racial or ethnic minority. The 1988 results differ in that poverty has a greater impact than race or ethnicity, particularly among fundamentalist Protestants. Other non-Catholic poor had the highest rates. Effective use needs reinforcement through education and counseling, particularly among young couples. Individual factors which affect contraceptive failure need to be adequately researched. Contraceptive research and development need to focus more on contraceptive options for differing stages of reproductive lives. Better abortion reporting is needed.


Asunto(s)
Aborto Inducido/estadística & datos numéricos , Conocimientos, Actitudes y Práctica en Salud , Embarazo no Deseado/estadística & datos numéricos , Adolescente , Adulto , Estudios Transversales , Femenino , Humanos , Incidencia , Recién Nacido , Embarazo , Estados Unidos/epidemiología
18.
Demography ; 29(1): 113-26, 1992 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-1547898

RESUMEN

Although research on reproductive behavior depends heavily on information from surveys, abortions are characteristically underreported in such data. Estimates of the level of reporting are made for each of the recent major surveys of U.S. women: the 1976, 1982, and 1988 cycles of the National Survey of Family Growth, the 1976 and 1979 National Surveys of Young Women, and the National Longitudinal Surveys of Work Experience of Youth. The estimates are based on comparisons with external counts of abortions taking place. We examine variation by characteristics of women, trends over time, and the possible effects of length of recall and of the way in which questions about abortion are asked. Abortion reporting is found to be highly deficient in all the surveys, although the level varies widely. Whites are more likely to report their abortions than nonwhites. Special, confidential questioning procedures hold promise for improving the results.


Asunto(s)
Aborto Legal/estadística & datos numéricos , Sesgo , Aborto Legal/tendencias , Adolescente , Adulto , Estudios Transversales , Demografía , Femenino , Humanos , Incidencia , Estudios Longitudinales , Embarazo , Embarazo en Adolescencia/estadística & datos numéricos , Estados Unidos/epidemiología
19.
Fam Plann Perspect ; 9(4): 153-7, 1977.
Artículo en Inglés | MEDLINE | ID: mdl-881008

RESUMEN

Although the pill remains the most popular method of contraception among young married women, sterilization is now the method of choice among couples married a decade or more, as well as among couples who have had all the children they want. Indeed, contraceptive and medical sterilizations combined now comprise the most frequent barrier to conception among all married couples of reproductive age. Three-quarters of couples using contraception now use the most effective methods, the pill, sterilization or the IUD, and the trend data suggest a continuing increase in the reliance on such methods.


Asunto(s)
Servicios de Planificación Familiar , Esterilización Reproductiva/estadística & datos numéricos , Adulto , Dispositivos Anticonceptivos/estadística & datos numéricos , Anticonceptivos Orales , Femenino , Humanos , Dispositivos Intrauterinos/estadística & datos numéricos , Masculino , Estados Unidos
20.
Fam Plann Perspect ; 9(5): 203-7, 1977.
Artículo en Inglés | MEDLINE | ID: mdl-902714

RESUMEN

Except for sterilization, Catholic and non-Catholic contraceptive practices are now quite similar. Within several years, even sterilization will probably be adopted by the same proportions of Catholics as non-Catholics, and the rhythm method is destined to be of historical interest only. The wide gulf between official Catholic doctrine and the birth control behavior of Catholics can only deepen in the next few years.


Asunto(s)
Catolicismo , Anticoncepción , Adolescente , Adulto , Anticonceptivos Femeninos , Dispositivos Anticonceptivos , Anticonceptivos Orales , Escolaridad , Femenino , Humanos , Dispositivos Intrauterinos , Matrimonio , Métodos Naturales de Planificación Familiar , Esterilización Reproductiva , Estados Unidos
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA