[Perinatal drug abuse. Collaborative perinatal care for drug abusers and their infants]

Pregnant drug abusers are a group with very high risk of perinatal morbidity. Intensive prenatal care, with substitution maintenance programs, by a medico-psycho-social team working in concert with ambulatory health and social workers, may prevent perinatal complications and mother-infant separation. The results of such a perinatal program, in a suburban low-socioeconomic population, are described. In comparison with reports in the literature, this approach appears to provide significant perinatal medical and social prognosis for pregnant abusers and their neonates.

Évaluation nationale des besoins en lits de réanimation et soins intensifs néonatals

The setting up of the so-called "decrees on perinatal safety" on October 1998 has been associated with many difficulties which were apparently related to the lack of beds for intensive care units, special care units and neonatal medicine. This led to a national survey.

OBJECTIVES

The aim of the survey was : (1) to collect the number of neonates requiring hospitalization in NICU and special care units over a 1-week period in metropolitan France and overseas departments and territories; (2) to assess the needs in equipments and care-givers.

METHODS

The writs to be included in the survey were previously identified. Each day of hospitalization was classified as needing an intensive care unit, a special care unit or a neonatal unit. Then it was classified as well fitted or badly fitted.

RESULTS

Two hundred and forty units (90% of the French units) from 204 hospitals participated in the survey and 3678 neonates were included and accumulated 17 583 days of hospitalization (NICU: 2728; special care: 5047; neonatal medicine: 9808). One thousand and five hundred and ninety hospitalization days did not fit well either with the technical level required by the neonate or/and with the location of the parents' home (9.2%): 23.1% in overseas departments and territories; 12% in metropolitan France. The main reasons for maladjustment were: a too high technical level: (59%); an insufficient technical level: (21%) (19 neonates could not be admitted in a NICU as they needed). The survey included 158 NICU and special care units. Taking into consideration the French law: the lack in equipment was: 294 ventilators, 231 cardio-respiratory monitors, 116 pulse oxymeters and 513 blood pressure monitors; 561 additional pediatricians were needed to allow a medical night duties including seven doctors in each NICU and each special care unit; 1878 additional nurses were also needed. Making the assumption that the mean occupation rate of the neonatal beds should be 70%, the needs were calculated for 1000 live births: metropolitan France: 0.76 (0.74; 0.78) in NICU; 1.45 (1.43-1.47) in special care units; overseas departments and territories: 2 (1.8-2.5) in NICU; 3.5 (3.2-3.8) in special care units.

CONCLUSION

Finally, the main deficit was not related to the number of beds but to the equipment and number of care-givers. The status of overseas departments and territories was particularly worrying.

A simulation model for evaluating the medical and economic outcomes of screening strategies for colorectal cancer

Mathematical models have been shown to be useful in predicting the cost-effectiveness of cancer screening programmes. We designed a computer macro-simulation model aimed at predicting the cost-effectiveness of alternative colorectal cancer screening strategies. This model was built to determine the cost-effectiveness of a biennial screening programme using the Hemoccult test in Burgundy (France). It was validated with data from the Danish randomized study. Estimates of our model showed an extremely close concordance with observed results in the Danish study. The observed mortality reduction was 18.0% and the estimated mortality reduction was 18.4%. Preliminary data from the Burgundy study predict a 14.6% colorectal cancer mortality reduction after 10 years. Sensitivity analyses were performed with different assumptions regarding the participation rates and the lead-time. This model can serve to assess the cost-effectiveness of a variety of screening modalities.

[A diagnostic strategy for isolated pulmonary nodules less than 2 cm in diameter]

The object of this study is to determine the best diagnostic strategy for isolated pulmonary nodules less than 2 cm in diameter starting from decision analysis. The diagnostic pathway included strategies: 1. Observation with a thoracic tomodensitometry (TDM) every 3 months. 2. Percutaneous needle biopsy. 3. Video-assisted thoracoscopic surgery (VATS) resection. 4. Resection by thoracotomy. Observation was the best strategy for non-smokers in their 40's with a cost of 57-69 Francs per year of life gained. Needle biopsy was the best strategy for a 1 cm nodule in patients of 50 years, smokers and non-smokers (life expectancy 29.38 and 24.44 years). The best strategy for a 2 cm nodule was needle biopsy in 40 year old smokers (life expectancy 34.18 years) and in non-smokers aged 50-60 years with a life expectancy from 20.0 to 28.2 years. VATS was the best strategy for a 1 cm nodule in smokers over the age of 60 for a 2 cm nodule over the age of 50. The costs were 1 811, 3 214, 1 873, 1 811 and 6 093 Francs respectively per year of life gained. During the sensitivity analysis VATS remained the best strategy provided the post-operative mortality remained below 2%. When the risk of malignancy is only moderate needle biopsy may be recommended but when the risk of malignancy is high it is preferable to advise VATS as the method of diagnosis.

Bayesian population model of methotrexate to guide dosage adjustments for folate rescue in patients with breast cancer

BACKGROUND

Methotrexate (MTX) infusions may induce severe side-effects, and alkaline hydration along with folinic acid rescue is a common way to reduce such toxic risks. The purpose of this study was to develop an adaptive rescue strategy based upon the early detection of patients with impaired MTX elimination.

METHODS AND RESULTS

In this study, we propose a simple population-based Bayesian approach for predicting MTX plasma concentration from a limited number of samples, so as to adapt both duration and dosage of the rescue agent to be used next. Ten kinetic profiles obtained after 10 courses of MTX (1.5 g/m2) in seven patients with inflammatory breast cancer were used to establish the population pharmacokinetic parameters (Cl, 8.16 L/h; t1/2, 12.7 h). This population was next involved in the Bayesian estimation of MTX individual pharmacokinetic parameters from only two blood samples (T24 and T36 h), thus allowing one to forecast the elimination of this drug by predicting MTX levels at 48 h. According to the MTX concentrations predicted during the elimination phase, folinic acid rescue was then prolonged in patients likely to be overexposed.

CONCLUSION

The Bayesian estimation presented in this study was an easy and convenient method to efficiently detect patients with impaired MTX elimination in routine clinical practice. This information enabled the introduction of strategies for minimizing the risk of severe drug toxicity.

[Withdrawal syndromes of newborns of pregnant drug abusers maintained under methadone or high-dose buprenorphine: 246 cases]

Perinatal prognosis of pregnant drug abusers is better with intensive prenatal care and substitution maintenance programs. There is a large body of data in the literature on methadone (MTD), but very little on high-dose buprenorphine (HDB). The objective of this study was to compare 2 groups of pregnant women maintained on MTD or HDB for perinatal events.

STUDY DESIGN

Prospective multicentric study; all neonates (NN) whose mothers has been maintained during pregnancy on MTD or HDB were included by 34 French perinatal centers with specialized staff for care of these pregnant drug abusers.

RESULTS

Two hundred and forty-six pregnant women were included: 93 (38%) MTD and 153 (62%) HDB. Social and perinatal data, prenatal care and factors correlated with poor prenatal care are reported. Forty-six percent of the pregnant women had good prenatal care; 88% had peridural analgesia; mean birthweight=2838g; mean gestational age=38.7 weeks; prematurity<37 weeks=13; intra-uterine growth retardation=32%. Sixty-five percent neonates had withdrawal neonatal syndrome (WNNS) at a mean age of beginning at H40, mean highest Lipsitz score was 8.2 at H78. Half of the neonates with WNNS received treatment, mainly with morphine chlorhydrate. Neonatal mortality was 0/246. Discharge of the neonates was 60% with their father and their mother, and 32% with their mother alone; 4% were placed in foster homes by judicial decision. The only statistically significant differences between the MTD and HDB groups were: maintenance program was more frequently initiated before this pregnancy for the HDB vs MTD group (p<0.03); MTD maintenance was more often supervised by maintenance specialized centers and HDB by general practitioners (p<0.001); prematurity was 18% for MTD group vs 9% for HDB group (p<0.04); mean age of maximum Lipsitz score was H92 for MTD group vs H70 for HDB group (p<0.001).

CONCLUSIONS

The perinatal medical and social prognosis of these 246 pregnant drug abusers and of their neonates appeared to be improved by the specialized prenatal care, comparatively with literature data. Perinatal impact of substitution program during pregnancy would be similar with MTD or HDB.

Chemotherapy and concomitant irradiation in inflammatory breast cancer

The purpose of this study was to evaluate the efficacy of concurrent chemotherapy and irradiation in inflammatory breast cancer (IBC). Between January 1990 and December 1998, forty-eight non-metastatic patients with clinical or occult IBC were treated with chemotherapy and irradiation. The induction chemotherapy consisted of epirubicin, cyclophosphamide and vindesin, in association with split-course bi-fractionated irradiation to a total dose of 65 Gy with concomitant cisplatin and fluorouracil. Maintenance chemotherapy consisted of high-dose methotrexate and 6 cycles of epirubicin, cyclophosphamide and fluorouracil Hormonal treatment was given routinely but mastectomies were not routinely performed. A high rate of locoregional control was obtained in 47 evaluable patients of whom 93.6 % achieved a complete clinical response. Three patients had locoregional relapses, always with concomitant metastatic dissemination. In 47 patients, 21 developed metastatic dissemination with a median delay of 23 months. Median disease-free survival (DFS) was 45 months. Median overall survival (OS) has not yet been reached after a median follow-up of 44.5 months. The 3-year DFS rate was 53 % and the 3-year OS rate was 71 %. Toxicity was mainly hematological. During the induction therapy, grade 3 or 4 neutropenia occurred in 54 % of patients, grade 3 or 4 thrombocytopenia in 23 % and grade 3 or 4 anemia in 8 %. The administration of induction chemotherapy and concomitant irradiation is feasible in patients with IBC. The hematological toxicity of this treatment approach is significant but nevertheless, the treatment achieves a high degree of locoregional control and improved survivaL

Estimation of screening test (Hemoccult) sensitivity in colorectal cancer mass screening

3 controlled cohorts of mass-screening for colorectal cancer using a biennial faecal occult blood (HemoccultII test on well-defined European populations have demonstrated a 14% to 18% reduction in specific mortality. We aimed to estimate the sensitivity (S) of this HemoccultII test and and also mean sojourn time (MST) from French colorectal mass-screening programme data. 6 biennial screening rounds were performed from 1988 to 1998 in 45 603 individuals aged 45-74 years in Saône-et-Loire (Burgundy, France). The prevalent/incidence ratio was calculated in order to obtain a direct estimate of the product S.MST. The analysis of the proportional incidence and its modelling was used to derive an indirect estimate of S and MST. The product S.MST was higher for males than females and higher for left colon than either the right colon or rectum. The analysis of the proportional incidence confirmed the result for subsites but no other significant differences were found. The sensitivity was estimated at 0.57 and the MST at 2.56 years. This study confirms that the sensitivity of the Hemoccult test is relatively low and that the relatively short sojourn time is in favour of annual screening.

Contribution of a pacemaker bradycardia detection algorithm in the study of patients with carotid sinus syndrome

While carotid sinus syndrome (CSS) is often suspected as a cause of syncope in the elderly, whether it represents an indication for cardiac pacing may remain uncertain. Bradycardia algorithms included in pacemakers are now able to establish a precise relationship between spontaneous asystole and occurrence of symptoms and strengthen the indication for permanent pacing. This study included seven men and three women (70.5 +/- 7.3 years of age) who, over an average period of 54.1 +/- 17 months, had suffered from syncope (12.6 episodes/patient) and presyncope (11.2 episodes/patient) attributed to pure cardioinhibition (2 patients) or mixed CSS (8 patients). Other sources of symptoms were excluded by thorough clinical evaluations, including Holter monitoring, echocardiography, and electrophysiological testing. All patients received a CHORUS 6234 pacemaker, the memory of which includes a dedicated bradycardia detection algorithm capable of storing atrial and ventricular chains, and date and time of the last ten pauses and/or bradycardic events. After a initial period of 14.7 +/- 8 months, during which symptoms were suppressed, the bradycardia algorithm was activated. From then on, a cumulative increase in the number of patients presenting with diurnal pauses was measured (1 month, n = 0; 3 months, n = 6; 9 months, n = 7; 2 years, n = 8). Fourteen episodes of diurnal asystole were recorded. The mean duration of the longest episodes of spontaneous ventricular standstill was 6,319 +/- 1,615 ms and was due to sinoatrial block (n = 7), atrioventricular block (n = 5), and a combination of both (n = 2). In conclusion, activation of the CHORUS bradycardia algorithm allowed confirmation of the appropriateness of permanent pacing in a majority of patients suffering from CSS.

[Disposable versus reusable biopsy forceps. A prospective cost analysis in the gastrointestinal endoscopy unit of the Dijon University Hospital]

AIMS

The goal of this study was to compare the cost of a biopsy session performed with a disposable and a reusable endoscopic biopsy forceps.

MATERIAL AND METHODS

Over a 10-month period, 15 new reusable forceps (10 gastric and 5 colonic) were prospectively tracked. A biopsy session performed with a reusable forceps included its current purchase price, the sterilization cost and the number of uses. A biopsy session performed with a disposable forceps was calculated with its current purchase price and its incineration cost.

RESULTS

At the end of the study, only one reusable forceps had broken and the number of uses was 65. The cost of a biopsy session performed with a gastric reusable forceps was euro 7.52 (including euro 1.92 of sterilization cost) and euro 8.67 for a reusable colonic forceps (with the same sterilization cost). The cost of a biopsy session performed with a gastric or a colonic disposable forceps was euro 11.98. From 44 uses for a colonic forceps and 37 uses for a gastric one, a biopsy session performed with a reusable forceps was already cheaper.

CONCLUSION

In this study, a biopsy session performed with a reusable forceps was less expensive than with a disposable one. However, the extra cost generated by the disposable forceps may be offset by an easier inventory control and the reduction of the cross contamination risk.

Family history and risk of colorectal cancer: implications for screening programmes

OBJECTIVE

To estimate the lifetime risk of colorectal cancer in the general population and in first degree relatives of patients with sporadic colorectal cancer or adenoma.

MAIN OUTCOMES MEASURES

The cumulative risk of colorectal cancer (0-74) in the general population combined with the relative risk of colorectal cancer and the prevalence of different groups of subjects with family history of colorectal tumour allows the calculation of cumulative risks in these groups.

RESULTS

The lifetime risk of colorectal cancer was 1 in 23 in men and 1 in 40 in women. In males, 0.5% in the 55-59 age group and 4.5% in the 70-74 age group will develop a colorectal cancer. The corresponding values in females were 0.4% and 2.5%. The cumulative risk at age 74 varied between 7.7% (one family member affected) and 25.6% (two affected) in males, and 4.3% and 14.3% respectively in females. The risk in the 40-44 year age group for individuals with one first degree relative affected before 45 years of age was 0.5%, similar to that of those aged 45-49 with one first degree relative affected with a colorectal cancer or a large adenoma (> 1 cm).

CONCLUSIONS

These results suggest that screening in the general population should start at 50 or 55. The lifetime risk is high enough (over 10%) among individuals with one affected first degree relative before age 45, or with at least two affected first degree relatives, to warrant colonoscopic screening. The data provide a basis for recommendations that relatives of these patients should enter screening programmes at age 40 to 44.

[Neonatal withdrawal syndrome in twins born to a mother on methadone substitution]

We report the cases of two female twins whose mother was taking methadone substitution therapy. These cases demonstrate the unpredictable nature of the neonatal withdrawal syndrome. One baby developed signs of withdrawal late 10 days after birth. She had a less severe syndrome than her twin sister who was hypotrophic and developed signs on day 1 which persisted for 6 weeks.

[Effects of hormone replacement therapy for menopause on prognostic factors of breast cancer]

AIM

Hormone replacement therapy (HRT) is widely used by post-menopausal women. Although this treatment may slightly increase the incidence of breast cancer, more and more cases are diagnosed while women are taking HRT. The purpose of this study was to ascertain the influence of HRT on prognostic factors and outcome of breast cancer. Data on all breast cancer patients, including precise information on HRT, was prospectively and systematically recorded in a data base.

PATIENTS AND METHODS

From 1990 to 1998, 1223 post-menopausal women fulfilled the eligibility criteria for this study. The clinical features, laboratory findings and survival rates in 245 HRT users who developed breast cancer while being treated were compared with those of 245 matched breast cancer patients who had never received HRT.

RESULTS

Patients who developed breast cancer during HRT had fewer locally advanced cancers and smaller and better-differentiated cancers. Estradiol receptivity was quantitatively lower in users. Metastasis-free survival were better for the users.

CONCLUSION

We conclude that HRT does not affect the prognosis of breast cancer. Regular surveillance during HRT allows early detection of smaller lesions. The higher number of well-differentiated cancers and the distribution of hormone receptivity may reflect interaction between neoplastic tissue and exogenous hormones.

The inclusion of fluoxetine into gamma-cyclodextrin increases its bioavailability: behavioral, electrophysiological and pharmacokinetic studies

The inclusion of a drug into cyclodextrin generally results in the modification of its physical and chemical properties and sometimes can increase its oral bioavailability. The aim of this study was to compare the effects of the fluoxetine HCl/gamma-cyclodextrin complex to that of traditional fluoxetine HCl. In the forced swimming test in mice, fluoxetine HCl/gamma-cyclodextrin was more effective than fluoxetine HCl, the ED30s being, respectively, 9.5 and 16.9 mg/kg PO. Both compounds (10 mg/kg PO) were able to reduce the firing rate of dorsal raphe neurons in the rat. However, between-groups comparisons showed no significant differences between fluoxetine HCl treated animals and the vehicle group, while fluoxetine HCl/gamma-cyclodextrin appeared significantly more effective than vehicle from minute 25 of the measurement period. In healthy volunteers, the relative oral bioavailability, calculated as the ratio AUC 0-infinity fluoxetine HCl/gamma-cyclodextrin on AUC 0-infinity fluoxetine HCl (20 mg PO), was equal to 249.9%. The three experiments taken together suggest that the complexation of fluoxetine HCl into gamma-cyclodextrin increases its pharmacological efficacy in animals, this effect being related to an enhancement of its oral bioavailability as demonstrated in human healthy subjects.

[Pneumothorax revealing cystic adenomatoid malformation of the lung in a 13 year old child]

CASE REPORT

A 13 year old boy had a seven day history of chest pain and dyspnea. His right hemithorax was immobile with abolished breathing sounds. Initial chest X-ray revealed a right tension pneumothorax. A chest tube was inserted and the right lung re-expanded. However, despite two intrapleural injections of tetracyclin, the pneumothorax reappeared. Lung CT scan showed an intraparechymal cyst in the posterior part of the right upper lobe. Lobectomy was performed and histological study confirmed the diagnosis of type I cystic adenomatoid malformation of the lung. Two months after surgery, clinical and radiological examinations were normal.

CONCLUSION

Spontaneous pneumothorax, as the initial manifestation of cystic adenomatoid malformation of the lung, is rare (three cases reported in children beyond the neonatal period, and two in adults). CT scan features correlate well with the pathologic features. Because of the risk of recurrent pulmonary infections and malignancy change, removal of the cystic lesions is advisable.

Prognostic factors in ductal carcinoma in situ of the breast: results of a retrospective study of 575 cases. The Association for Research in Oncologic Gynecology

OBJECTIVE

Conservative treatment for ductal carcinoma in situ of the breast exposes patients to the risk of infiltrating recurrence which can lead to metastasis. The primary purposes of this retrospective study were to evaluate diagnostic and therapeutic methods over a 10-year period and to validate prognostic factors. This information should greatly improve patient selection for conservative treatment or mastectomy.

STUDY DESIGN

A multi-institutional data base including 575 patients treated between 1983 and 1993 was established by combining data from 16 French institutions. Survival at 5 and 7 years was studied as a function of various prognostic factors.

RESULTS

Recurrence-free survival at 7 years was 0.96 after modified radical mastectomy and 0.83 after breast-conserving treatment and radiotherapy (P=0.003). Metastasis-free survival at 7 years was 0.99 after modified radical mastectomy and 0.94 after breast-conserving treatment and radiotherapy (not significant). No factor was predictive of local recurrence after mastectomy. Clinical stage was the only factor significantly correlated with metastasis after mastectomy. Recurrence-free survival after breast-conserving treatment with radiotherapy was significantly lower for patients with comedo carcinoma, multifocal lesions, or unclear resection margins, regardless of whether the histological type was comedo or non-comedo carcinoma. Metastasis-free survival was significantly lower for patients with multifocal lesions and for patients with unclear margins after excision of comedo carcinoma.

CONCLUSIONS

Breast-conserving treatment with radiotherapy is a valid alternative to mastectomy. Patients must be selected carefully on the basis of morphological criteria. Swift gains in therapeutic outcome can be obtained by stressing quality control at each stage of diagnosis and treatment.

[Performance of the Hemoccult test in the screening of colorectal cancer and adenoma. Results of 5 screening campaigns in Saône-et-Loire]

OBJECTIVES

The aim of this population-based study was to specify the positivity rate, the positive predictive value of Hemoccult test as well as the characteristics of the cancers and adenomas screened during the successive colorectal cancer screening campaigns.

METHODS

This study focused on five colorectal cancer mass screening campaigns by Hemoccult test carried out between 1988 and 1996. The test was offered every two years to a cohort of subjects born between 1914 and 1943 and living in some districts of the Saône-et-Loire administrative area.

RESULTS

The positivity rate of the test was higher in the first campaign (2.1%) than in the subsequent ones (mean 1.3%). It was also higher in males than in females and it increased with age. After a positive test, 85.4% of the subjects had a colonic exploration. The exploration rate was higher when the test was offered by general practitioners (88.0%) than when it was mailed (77.8%) (P < 0.01). Through this test, cancer was detected in 168 patients, and one adenoma or more in 414 patients. The positive predictive value was 11.4% for cancer, 17.1% for adenoma > or = 1 cm and 11.1 for adenoma < 1 cm. It was higher in males than in females and it increased with age. Depending on the campaigns, 35.9% to 47.3% of the subjects explored after a positive test had a cancer or an adenoma. The screened cancers or adenomas were more often localized in the sigmoid or the rectum. Three quarters of screened cancers were stage I or II (TNM classification). All together, 82.7% of cancers were treated with surgical resection for cure and 10.1% with endoscopic resection.

CONCLUSIONS

This work confirms the feasibility of carrying out regular colorectal cancer screening campaigns, through which a few subjects can be selected for undergoing colonic explorations. These latter can detect a cancer or adenoma in 40% of cases.

Interval cancers in a community-based programme of colorectal cancer screening with faecal occult blood test

Interval cancers represent the major limitation of screening for colorectal cancer with the faecal occult blood test. The aim of this study was to describe the characteristics of interval cancers and the sensitivity of the screening programme in a well-defined French population. During five screening rounds, 398 cancers were diagnosed in those of the population having performed at least one screening test; 57.8% of them were interval cancers. The proportion of interval cancers was higher among cancers of the rectal ampulla (72.2%) than among cancers of other sites (52.9%) (P < 0.001). The proportion of TNM stage I and II were higher among screen-detected cancers (73.8%) than among interval cancers (57.4%). The overall sensitivity of the screening programme was 62.9% within 1 year, and 48.7% within 2 years. An improvement in the sensitivity of the faecal occult blood test for colorectal cancer screening is needed, without an unacceptable loss of specificity.

Faecal occult blood screening and reduction of colorectal cancer mortality: a case-control study

To estimate the efficacy of screening on colorectal cancer mortality, a population-based case-control study was conducted in well-defined areas of Burgundy (France). Screening by faecal occult blood test prior to diagnosis in cases born between 1914 and 1943 and who died of colorectal cancer diagnosed in 1988-94 was compared with screening in controls matched with the case for age, sex and place of residence. Cases were less likely to have been screened than controls, with an odds ratio (OR) of 0.67 [95% confidence interval (CI) 0.48-0.94]. The negative overall association did not differ by gender or by anatomical location. The odds ratio of death from colorectal cancer was 0.64 (95% CI 0.46-0.91) for those screened within 3 years of case diagnosis compared with those not screened. It was 1.14 (95% CI 0.50-2.63) for those screened more than 3 years before case diagnosis. There was a negative association between the risk of death from colorectal cancer and the number of participations in the screening campaigns. The inverse association between screening for faecal occult blood and fatal colorectal cancer suggests that screening can reduce colorectal cancer mortality. This report further supports recommendations for population-based mass screening with faecal occult blood test.

[Informative value of Hemoccult test according to the number of positive slides in mass screening of colorectal cancer]

Our aim was to study the relationship between the level of positivity of the Hemoccult colorectal cancer screening test and the positive predictive value on one hand, and the characteristics of the screened neoplasms on the other. This study focuses on four successive colorectal cancer screening campaigns in a population of 45,642 subjects born between 1914 and 1943. There were 1 or 2 positive slides in 50.1% of cases, 3 or 4 in 30.7% of cases and 5 or 6 in 19.2% of cases. The positive predictive value was 11.1% for cancer, 17.4% for adenoma > or = at 1 cm and 10.1% for adenoma < 1 cm. For a cancer or adenoma > or = at 1 cm, the positive predictive value varied between 18.6% when there were 1 or 2 positive slides, and 52.5% when there were 5 or 6 positive slides. Dukes A cancers are less likely to have 5 or 6 positive slides than more advanced cancers. On the contrary, neither cancer localisation nor characteristics of adenomas > or = at 1 cm (localisation, size, degree of dysplasia) influenced the number of positive slides. Owing to intermittent colorectal cancer bleeding, it seems necessary to take several successive samples. Two samples per stool over three successive stools seem like a good compromise. The informative value of the test increases with the number of positive slides.

[Research-action on medical and social management of uninsured pregnant women]

INTRODUCTION

Perinatal morbidity is increased among women without health insurance and/or receiving poor antenatal care. The objectives of this study were to estimate the prevalence of such situations, to analyze underlying social conditions, to identify possible means to secure health insurance and to assess the impact of the absence of health insurance on antenatal care and pregnancy outcomes.

MATERIAL AND METHODS

All pregnant women without health insurance during one calendar year were included. Those who delivered a live child were compared with a control group of women with health insurance who delivered a live child until the date of the last delivery for uninsured women. Statistical analyses were conducted to describe the characteristics of uninsured women and to identify risk factors for poor antenatal care and pregnancy outcomes.

RESULTS

A total of 259 uninsured women were enrolled, including 201 (78%) foreigners the majority of whom had resided in France for more than one year; 205 were followed-up and delivered in our hospital, including 192 live births. The social context of uninsured French women was worse than that of foreign uninsured women. Health insurance was obtained for 85% (173/205). Overall, the absence of health insurance was associated with increased risks for poor antenatal care. Being uninsured and receiving poor antenatal care was associated with an increase in the incidence of intra-uterine growth failure. Post-term deliveries were more frequent among women with poor antenatal care.

CONCLUSIONS

Improving antenatal care and health insurance coverage could help decrease perinatal morbidity, given the current increase in the number of women with social risk factors. It seems essential that all women obtain access to public maternity wards, and that these wards develop effective social services working in concert with ambulatory health and social workers.

Comparative study of pirlindole, a selective RIMA, and its two enantiomers using biochemical and behavioural techniques

The interaction with monoamine oxidase A (MAO-A) and B has been shown to be sensitive to the absolute configuration of molecules. Therefore, the aim of this study was to compare the effects of the racemic pirlindole (a selective and reversible MAO-A inhibitor) and its two enantiomers using biochemical techniques (in vitro and ex vivo determination of rat brain MAO-A and MAO-B activity) and behavioural models (forced swimming test and reserpine-induced hypothermia and palpebral ptosis test). In vitro, the MAO-A IC50 of (+/-)-pirlindole, R-(-)-pirlindole and S-(+)-pirlindole were 0.24, 0.43 and 0.18 microM, respectively. Ex vivo, their ID50 were 24.4, 37.8 and 18.7 mg/kg i.p. The differences between the three compounds were not significant, with a ratio between the two enantiomers [R-(-)/S-(+)] of 2.2 in vitro and 2.0 ex vivo. MAO-B was only slightly inhibited. In the forced swimming test and the reserpine-induced hypothermia and ptosis model, the three compounds had an antidepressant profile. In the forced swimming test, the minimal effective dose ratio between the R-(-) and the S-(+) was again around 2.0. The behavioural observations were thus clearly in accordance with the biochemical data.