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Biomedical subjects

P Y Ancel

Publications and source records attributed to P Y Ancel.

At least 19 recordsLinked to original sources
PubMed2006

Risk factors for early epithelial to mesenchymal transition in renal grafts.

Epithelial-to-mesenchymal transition (EMT) of tubular epithelial cells (TECs) may participate in the pathogenesis of renal fibrosis. We performed a prospective study of EMT markers in protocol biopsies obtained 3 months after engraftment from 56 patients who received deceased donor kidneys and who had stable renal function. The presence of EMT was examined, and quantified by immunohistochemical staining for vimentin and translocation of beta-catenin to the cytoplasm. EMT status was defined as the presence of EMT markers in > or = 10% of TECs. EMT features were virtually absent in implantation biopsies, whereas 41% of the grafts were EMT-positive in the absence of advanced chronic allograft nephropathy. Thirteen patients (23%) had borderline changes or acute rejection. EMT features were more frequent in these patients than in those with normal kidney grafts (vimentin expression, p = 0.003; beta-catenin translocation, p = 0.002). EMT in grafts corresponded with elevated serum creatinine of the donor before the recovery of kidney (p = 0.02) and longer cold ischemia time (p = 0.02). In contrast, the donor age had no influence on the expression of EMT markers. These results suggest that EMT is an early and frequent phenomenon in kidney transplants that could be triggered by immunological and/or ischemic tubular injury.

Adult↗
PubMed2002

[Preterm labor: pathophysiology, risk factors and outcomes].

Preterm labor (PL) is the main cause for hospital admission during pregnancy. 50% of all pregnant women are diagnosed with PL. 7% of all neonates are born prematurely and one third of all preterm births follow PL with intact membranes. Previous history of preterm delivery, young maternal age, low socio-economical status are established risk factors of PL with intact membranes. Intrauterine infection, abruptio placenta praevia and uterine and cervical anomalies are often associated with PL with intact membranes. Cytokines, cortico-releasing hormone and the fetal hypothalamic-pituitary-adrenal axis could trigger the prostaglandin cascade leading to PL. However data are lacking to conclude. Intrauterine infection can also lead to neonatal infection in the preterm babies. This is also an important risk factor of cerebral lesions and cerebral palsy. Outside perinatal infection, PL does not seem to increase neonatal death and neonatal morbidity compared with other causes of preterm delivery.

Corticotropin-Releasing Hormone↗
PubMed2001

Are risk factors the same for small for gestational age versus other preterm births?

OBJECTIVES: This article explores whether the impact of social and demographic risk factors for preterm birth differs for small for gestational age preterm births versus other preterm births. STUDY DESIGN: This was a European case control study of the determinants of preterm birth (4700 cases and 6460 controls). Small for gestational age and non-small for gestational age preterm births were compared with a control group of term births; relationships were explored further by stratifying preterm births into subgroups by mode of onset, the presence of hypertension, and gestational age. RESULTS: Of the social and demographic risk factors for preterm birth identified in this sample, high maternal age, smoking, and low and high maternal body mass index have a stronger effect on small for gestational age preterm births. In contrast, obstetric history, maternal education, and marital status have similar effects regardless of birth weight. Hypertension during pregnancy is strongly associated with small for gestational age preterm birth and contributes to an explanation of observed differences. CONCLUSIONS: These results underline the importance of considering fetal growth restriction in the analysis of risk factors for preterm birth.

Adult↗
PubMed2001

[Multiple pregnancy, place of delivery and mortality in very premature infants: early results from the EPIPAGE cohort in Ile-de-France area].

OBJECTIVE: To estimate stillbirth rate et neonatal mortality in very preterm infants in relation to gestational age at birth, place of delivery, and type of birth. PATIENTS AND METHODS: This study includes neonates from the EPIPAGE cohort survey, born between 22 and 32 weeks of gestation, in the Paris area from the first of February to the 31(st) of July 1997. Stillbirth rate and mortality before hospital discharge were studied. Level III facilities were defined by facilities that had an obstetric ward and intensive care unit for the newborn on the same site. RESULTS: Of the 772 neonates, 58% were born in level III centers. This percentage increased to 71% for multiple births. Mortality (stillbirth rate and mortality before discharge) of neonates born in level III was lower than the observed for neonates born in other centers (22.9% versus 45.8%). This difference was mainly due to difference in stillbirth rate and mortality in the delivery room. CONCLUSION: Differences in perinatal and neonatal mortality were observed between maternity units. It may reflect differences in attitudes. The explaination of such differences should be based only on long term outcome.

Cohort Studies↗
PubMed2000

Risk factors for 14-21 week abortions: a case-control study in Europe. The Europop Group.

Data from a case-control survey in Europe, carried out between 1994 and 1997, were used to investigate the risk factors for spontaneous abortions at 14-21 weeks (late abortions), according to the vital status of the fetus before the onset of labour. Late abortions included 62 involving a fetus alive before the onset of labour, 216 late abortions of a fetus already dead, together with 4592 control pregnancies at term (>/=37 weeks) from seven countries. Histories of induced abortion, spontaneous abortion and preterm birth were more closely associated with late abortion of a live fetus than with late abortion of a dead fetus. Women aged >/=35 years and women living alone had a much higher risk of late abortions than women aged 20-24 years and married women, regardless of the vital status of the fetus before labour. These results provide evidence that obstetric history and socio-demographic factors are risk factors for late abortions but differences are observed according to the vital status of the fetus before labour.

Abortion, Spontaneous↗
PubMed2000

Prognostic factors of reproductive outcome after myomectomy in infertile patients.

The objective of this study was to identify the prognostic factors for conception after myomectomy carried out in cases of infertility. A total of 91 infertile patients presenting at least one subserous or intramural myoma measuring >2 cm underwent myomectomy. The characteristics of the patients, myomata and associated infertility factors were collected in a uniform and systematic way. A postal questionnaire was sent to patients. For each of the various factors studied, the specific cumulative probability of spontaneous intrauterine conception was estimated using the Kaplan-Meier method. Multiple regression analysis was then carried out using Cox's proportional hazards model. The cumulative probability of spontaneous intrauterine conception at 2 years follow-up was 44% (95% confidence interval: 32-56%). The cumulative probability of conception was less after removal of a posterior or intramural myoma, after a sutured hysterotomy, and when accompanied by a male factor, associated tubal or ovulation pathology. The cumulative probability of conception was greater after ablation of myomata responsible for menometrorrhagia. The size, deforming effect on the cavity and age played no role in our sample. Our results indirectly suggest that post myomectomy adhesions could have an adverse effect on fertility. Myomata responsible for menometrorrhagia are also the cause of infertility. In the presence of an associated male, tubal or ovulatory factor, the results were poor and it was not possible to determine if a myomectomy should be performed in these cases in order to enhance fertility.

Adult↗
PubMed2000

Women's health after childbirth: a longitudinal study in France and Italy.

OBJECTIVE: To describe the prevalence of various symptoms five months and twelve months after childbirth in two European countries, according to employment, financial difficulties and relationship with partner. DESIGN: Longitudinal multicentre survey with a similar design in France and Italy. Women were interviewed three times: at birth and twice after childbirth. At 12 months after childbirth, the survey was postal in both countries. POPULATION: Women who had been delivered of their first or second baby in three maternity units in France and five units in Italy. Women who had multiple pregnancies, a stillbirth or known neonatal death were excluded. RESULTS: The response rates were 83% in France and 88% in Italy. Fifteen symptoms were considered. The results were similar in the two countries and showed that the prevalence of most symptoms was higher at 12 months than at five months after childbirth. When their baby was one year old, more than half of the women reported backache, anxiety and extreme tiredness. Around one-third of women reported headache, lack of sexual desire, sleep disorders and depression. Piles, constipation and painful intercourse were also common. One year postpartum women with financial problems or a difficult relationship reported poor psychological health more frequently. CONCLUSION: Physical and emotional problems are common after birth, and they tend to increase over time. Backache, headache and piles can seriously interfere with day-to-day life. Sexual problems also may be a source of unhappiness for the woman and her partner. Extreme tiredness, anxiety and depression may make a woman feel guilty for not corresponding to the image of a healthy, happy and well-coping mother. There is a link between financial problems or a difficult relationship with her partner and her own wellbeing. Health professionals should be aware of the high prevalence of health problems among new mothers, and of the social context of women who are more likely to suffer from them. They should counsel the women in their care, in order to help them to find the best solution, be it medical or social in nature.

Cohort Studies↗
PubMed2000

The relationship between intrauterine growth restriction and preterm delivery: an empirical approach using data from a European case-control study.

OBJECTIVE: To test whether being small for gestational age, defined as having a birthweight less than the 10th centile of intrauterine growth references, is a risk factor for preterm delivery for singleton live births. DESIGN: A case-control study. SETTING: Maternity hospitals in 16 European countries. SAMPLE: Four thousand and seven hundred preterm infants between 22 and 36 completed weeks of gestation and 6,460 control infants between 37 and 40 weeks of gestation. METHODS: Newborn babies are identified as being small for gestational age using customized reference standards derived from models of fetal growth. The impact of being small for gestational age on preterm delivery is estimated using logistic regression. MAIN OUTCOME MEASURE: Spontaneous or induced preterm delivery. RESULTS: Being small for gestational age is significantly associated with preterm birth, although the magnitude of this association differs greatly by type of delivery and gestational age. Over 40% of induced preterm births for reasons other than the premature rupture of membranes are small for gestational age compared with 10.7% of control infants (OR 6.41). For spontaneous or premature rupture of membranes related preterm births, the association is also significant, but weaker (OR 1.51). The relationship between growth restriction and preterm delivery is strongest for preterm births before 34 weeks of gestation. CONCLUSIONS: These findings highlight the phenomenon of abnormal fetal growth in all premature infants and, in particular, infants delivered by medical decision for reasons other than premature rupture of membranes. The observed association between being small for gestational age and preterm delivery among spontaneous preterm births merits further attention because the causal mechanisms are not well understood.

Case-Control Studies↗
PubMed2000

Unemployment and psychological distress one year after childbirth in France.

STUDY OBJECTIVE: To analyse the relation between unemployment and the psychological distress of mothers one year after childbirth. DESIGN: Multicentric survey concerning births occurring between September 1993 and July 1994. SETTING: In France: two maternity units in the Parisian area and one in Champagne-Ardennes, in the east of France, comprising both urban and rural areas. PARTICIPANTS: Primipara and secondipara women were interviewed three times: at birth by a face to face interview, five months and 12 months after the birth, by postal questionnaires, with a 83% response rate for the two postal questionnaires. The analysis includes 632 women who answered all three stages of the survey. MEASUREMENTS: Psychological distress was mainly assessed one year after birth by the 12-item General Health Questionnaire. RESULTS: After adjustment for unwanted pregnancy, marital conflicts, marital status, hospitalisation of the baby during the last year, lack of confiding relationship, depressive or anxious troubles before pregnancy, age, educational level and parity, unemployed women had an excess of psychological distress compared with employed women (OR = 1.87; 95% CI = 1.12, 3.13). The ratios for housewives were very close to those of employed women. Among the unemployed women, 60% had recently been without a job, since a few months before or after the birth. An excess of psychological distress among unemployed compared with employed women was observed in all social groups defined by the current or last occupation, but with various extents. Psychological distress was specially linked to the employment status in the group of women with the more qualified occupations. CONCLUSION: Even after a birth, when women are very much involved in their maternal role, those seeking a job have worse mental health than those in a stable situation, either employed or housewives. In France, the unemployment rate among young women is high. It is specially important that social regulations protecting employment during and after pregnancy are adequately applied. Employers, legislators, such as medical doctors, have to be aware to this situation.

Adult↗
PubMed2000

[Risk factors for prematurity in France and comparisons between spontaneous prematurity and induced labor: results from The National Perinatal Survey 1995].

OBJECTIVE: To study risk factors of total preterm delivery, spontaneous preterm delivery and induced preterm delivery. POPULATION: Representative sample of births in 1995 in France, including 12869 single births. METHOD: Preterm deliveries included all births before 37 weeks. Risk factors were analyzed with logistic regression. Factors of spontaneous preterm delivery (after spontaneous onset of labor) and factors of induced preterm delivery (after induction or cesarean section before labor) were compared with polytomous logistic regression. RESULTS: The main risk factors of preterm delivery were history of adverse pregnancy outcome (ORa=4. 5), history of induced abortion (ORa=1.5), 35 year old or more (ORa=1.5) and inadequate antenatal care (ORa=2.1). Other factors such as age under 20 or being single were not significantly linked to preterm delivery. Risk factors differed slightly between spontaneous and induced preterm deliveries. CONCLUSION: The present risk factors do not always correspond with the well-known factors. Thus the assessment of risk factors would be necessary at regular interval. The small differences between the risk factors of spontaneous preterm delivery and induced preterm delivery may be explained by difficulties in defining those two types of preterm delivery or by difficulties in distinguishing specific causes for each of them.

Adult↗
PubMed1999

Social differences of very preterm birth in Europe: interaction with obstetric history. Europop Group.

Social differences of very preterm birth (22-32 completed weeks of amenorrhea) were studied using data from a large case-control survey in Europe between 1994 and 1997; 1,675 very preterm births and 7,965 full-term births were included. The relation between social factors and very preterm birth was studied according to obstetric history and the mode of delivery onset. Very preterm birth was significantly related to low educational level among women with no previous adverse pregnancy outcome (odds ratio (OR) = 2.67, 95 percent confidence interval (CI) 1.66-4.28) and among primigravid women and those with previous first-trimester abortion (OR = 2.01, 95 percent CI 1.56-2.58). In this group, unemployment of all household members was associated with a double risk of very preterm birth. No significant association between very preterm birth and socioeconomic status was observed among women with previous second-trimester abortion or preterm birth. Socioeconomic indicators remained significantly associated with both spontaneous and induced very preterm births among women with no previous late fetal loss or preterm birth. The results are consistent with social factors affecting the risk of very preterm birth, but the relation differs according to obstetric history.

Adolescent↗
PubMed1999

Very and moderate preterm births: are the risk factors different?

OBJECTIVE: To describe the risk factors for very preterm births and to compare the strengths of the associations between these risk factors and very and moderate preterm births. DESIGN: A case-control study. SETTING: Fifteen European countries. METHODS: Between 1994 and 1997, 1675 very preterm births, 3652 moderate preterm births and an unmatched control group of 7965 births at term were included. Odds ratios for very and moderate preterm births (related to socioeconomic status, behavioural factors, maternal age, body mass index and obstetric history) were estimated and compared using polytomous logistic regression. RESULTS: Underprivileged social situation, older maternal age and adverse previous pregnancy outcomes were significantly related to very and moderate preterm births. However, these factors were more strongly associated with very preterm births than with moderate preterm births, for both spontaneous and induced deliveries. Smoking during pregnancy, young maternal age and low body mass index were significantly related to very and moderate spontaneous preterm births, but no significant difference in odds ratios was observed between the two outcomes. CONCLUSION: These results suggest that risk factors for very and moderate preterm births are similar, but the strength of the associations differ, especially for social factors and obstetric history.

Adult↗
PubMed1999

[Value of multinomial model in epidemiology: application to the comparison of risk factors for severely and moderately preterm births].

BACKGROUND: The multinomial logistic regression model is employed to model the relationship between an outcome variable with more than two categories and a set of covariates. This model is not widely used in epidemiology. We discuss the value of the multinomial model by comparing it with the binary logistic model, and we present a statistical comparison of odds ratios (OR) using the multinomial model. We studied the associations between obstetric history and very (< 33 weeks of amenorrhea) and moderate (33-36 weeks) preterm births. METHODS: Parameters (lnOR) of very and moderate preterm births, associated with the severity of obstetric history (none=0, moderate=1, severe=2), were estimated using two logistic binary models (moderate preterm births vs full-term births (>=37 weeks), and very preterm births vs full-term births) and one logistic multinomial model which compared very and moderate preterm births to full-term births. These analyses were performed before and after adjustment for a covariate: the country of survey. Parameters of very preterm birth and moderate preterm birth, estimated from multinomial model, were compared using Wald test. These analyses were performed using data from a large case-control survey in Europe, the EUROPOP survey; 1 675 very preterm births, 3 652 moderate preterm births and 7 965 full-term births were included. RESULTS: Crude parameters of very and moderate preterm births were similar, regardless the logistic regression model, binary or multinomial. The estimated parameters slightly differ after adjustment for the covariate, but lower variance estimates were obtained using multinomial logistic regression model. Parameters of very preterm birth associated with moderate obstetric history, B(gp)=0.5040, and severe obstetric history, B(gp)'=1.545, differ significantly from those of moderate preterm birth, B(pm)=0.4434 and B(pm)'=1.223 respectively (p < 0.001). CONCLUSION: Parameters obtained in separate logistic binary models are close to those obtained in a multinomial model. The multinomial model is useful for testing the heterogeneity of risk factors for distinct health problems.

Gestational Age↗
PubMed1998

Risk factors for maternal condition at admission to an intensive care unit: does health care organisation play a role? Study Group of the Maternal Morbidity.

The objective of this study was to analyse the relation between severity of maternal condition at the time of intensive care unit (ICU) admission and various individual and institutional factors. This study analysed data from a retrospective population-based study in three French regions during 1991. The population study included 355 patients who were admitted to an ICU during pregnancy, delivery or within 42 days after delivery, for an obstetrical cause. The main outcome measure was the severity of maternal condition at ICU admission estimated from the level of consciousness and from the Simplified Acute Physiology Score (SAPS). The most severe maternal condition was associated with a change in hospital category (from the initially chosen hospital to the hospital referring for ICU) (OR 3.8, 95% CI 1.5-9.6) and with treatment in a private hospital at ICU referral (OR 3.3, 95% CI 1.3-8.3). Foreign nationality was the only individual factor related to very severe maternal condition. These results suggest that health care organisation during pregnancy affects the prognosis of severe maternal condition. The factors involved appear to include the management of unpredictable disorders, the conditions of maternal transfers before ICU admission, and antenatal care of foreigners.

Adult↗
PubMed1997

Case-control study of risk factors for obstetric patients' admission to intensive care units.

OBJECTIVE: To identify risk factors among pregnant and newly delivered women to be treated in intensive care unit (ICU). STUDY DESIGN: A case-control survey of pregnant women or delivered within the past 42 days admitted to ICU was performed in three regions of France. Two controls by subject were matched for hospital and outcome (vaginal delivery, caesarean section, abortion or ectopic pregnancy). Bivariate and multivariate analyses, using different models were done. The conference intervals (CI) are 95% intervals. The odds ratio (OR) were adjusted on matching factors in univariate analysis, and adjusted on all factors included in the multivariate analysis. RESULTS: 375 subjects treated in ICU and 750 controls were included in the study. These women did not differ in age, marital status or social class, but the cases were more often of non-European nationality. They had more often medical antecedents which were also more serious. The subjects consulted at the maternity facility less frequently than did controls. The following variables increased the risk of ICU admission: no maternal consultation at the maternity ward (OR 2.8, CI 1.5-5.1) serious past medical history (OR 2.7, CI 2.0-3.6), non-European ascertained before the condition of the patient worsens it is argued that more attention could be paid to them. Regarding the risk associated to multiple pregnancy, further efforts to prevent them ought to be considered.

Adult↗
PubMed1997

[Intensive care of pregnant and puerperal women. Characteristics of patients and health management structures].

INTRODUCTION: In order to understand why maternal mortality is higher in France than in other comparable countries, an epidemiological survey was carried out concerning critical illness during pregnancy, delivery and post partum, to ascertain the frequency of critical illnesses, and describe the characteristics of the patients as well as of the obstetrical services caring for them. MATERIAL AND METHOD: The survey was carried out on all obstetric patients treated in intensive care units (ICU), in three French regions for one year. A detailed questionnaire was retrospectively filled out by a specialized investigator, according to the patient's medical file. RESULTS: The frequency of critical illness was estimated at 310 SD 36 per 100,000 live births. Hypertensive diseases (26%) are the most frequent diagnosis that motivated admission to ICU, followed by the hemorrhages (20%), and then the indirect obstetric causes (17%). A large part of these patients was affected by seriously poor conditions before the present pregnancy. Public hospitals were most often implicated in the care of these patients since the beginning of the pregnancy and still more at the moment of the delivery. There was no difference in prenatal care from one type of hospital to another. On the contrary, pathologies and hospitalisation during pregnancy then the causes and the time of admission to ICU as well as the seriousness of maternal conditions were statistically different from one type of hospital to much more frequently in such pregnancies. Letality did not differ according to the various classes of maternity ward but did differ according to the pathologies leading to the treatment in ICU. CONCLUSION: A large proportion of pregnant women experience seriously critical illness; the relationship between critical illness and maternal mortality according to health care must be studied in depth.

Critical Care↗