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PubMed2000

Differences in preterm delivery rates and outcomes in Jews and Bedouins in Southern Israel.

OBJECTIVE: (1) To compare the preterm delivery rates in the Bedouin versus the Jewish population. (2) To compare risk factors for preterm delivery in the two populations. (3) To compare outcomes of preterm delivery between the two groups. STUDY DESIGN: 41669 Jewish singletons births of whom 2816 delivered preterm (23-36 weeks) and 26495 Bedouin singletons in whom 2064 preterm deliveries occurred, were compared. All births took place in Soroka University Medical Center. Data were obtained from the computerized database of birth discharge records. RESULTS: The incidence of preterm delivery in Bedouin women was significantly higher than the rate in Jewish women (7.8 vs. 6.8%, P<0.01). The grand multiparity rate was higher among Bedouin women (P<0.001), as was the rate of teenage (<19 years) mothers (P<0.001). Gestational diabetes, PIH, and PROM rates were higher in the Jewish population (P<0.001, P=0.017, P<0.001, respectively). A bad obstetric history and previous perinatal mortality is more common in the Bedouin population (P<0.001 for both). In a logistic regression model including all these factors, the ethnic difference in the incidence of preterm delivery remained significant. The neonatal mortality rate was higher in the Bedouin population (P<0.001), as was the rate of congenital malformations (P<0.001). The perinatal mortality of Bedouins was nearly twice that of Jewish neonates with congenital malformations. However, no difference was found when neonates without congenital malformations were compared. Congenital malformations were found to be the strongest predictor of mortality. Ethnicity per se was no longer a predictor of mortality once congenital malformations were included in a logistic regression model, but the interaction of Bedouin ethnicity and congenital malformation was a significant predictor of mortality. CONCLUSION: The incidence of preterm delivery was significantly higher in Bedouin women than in Jewish women. A full explanation for this difference was not found. However, there were significantly higher rates of congenital malformations in the Bedouin preterm delivered infants. There was a much higher rate of neonatal mortality in the Bedouin population and this ethnic difference was fully explained by the presence of congenital anomalies.

Adult↗
PubMed2002

Differences in the prevalence of asthma and current wheeze between Jews and Arabs: results from a national survey of schoolchildren in Israel.

BACKGROUND: There is evidence that the prevalence of asthma is higher in Jewish schoolchildren than in Arab schoolchildren. It is not clear to what extent other risk factors explain these differences. OBJECTIVE: To evaluate whether the population group differences in the prevalence of asthma and current wheeze remain after adjustment for several potential risk factors. METHODS: A national survey of 10,057 13- to 14-year-old schoolchildren was carried out in Israel in 1997. There were 7,436 Jewish children and 2,621 Arab children. Differences in the two population groups were examined while controlling for demographic and environmental factors such as: sex, parental education, parental smoking and asthma, crowding, and presence of older siblings. RESULTS: The prevalence of asthma and current wheeze was significantly higher in Jewish children compared with Arab children. The asthma prevalence was 7.8% for Jewish children and 4.9% for Arab children (P = 0.001), and prevalence of current wheeze was 20.7 and 10.1%, respectively (P = 0.001). After adjustment for demographic and environmental factors, the prevalence of asthma and current wheeze was still increased in the Jewish population (odds ratios: 1.51; 95% confidence interval [CI] = 1.06 to 2.15; 2.15 95% CI = 1.70 to 2.73, respectively). History of asthma in parents and residence in a rural area were significant risk factors for asthma and current wheeze. In addition, the presence of less than three older siblings was a significant risk factor for asthma, and female sex, ever having pets, and maternal smoking were significantly associated with current wheeze. CONCLUSIONS: The differences between Jewish and Arab children were not explained by the studied factors. Genetic factors, different environmental exposure, and nutritional habits should be studied to further explain the differences between these populations.

Adolescent↗
PubMed1997

Ritual female genital surgery among Ethiopian Jews.

Ritual female genital surgery is usually associated with Muslim countries although it is normative also among Ethiopian Coptic Christians. Ethiopian Jewish women immigrants to Israel report that ritual female genital surgery was normative in their culture in Ethiopia, but expressed no desire to continue the custom in Israel. This contrasts with Israeli Bedouin Muslims, who were reported to regard ritual female genital surgery as an important part of their identity. Physical examination of 113 Ethiopian Jewish immigrant women in Israel found a variety of lesions in about a third of women, with 27% showing total or partial clitoral amputation. The heterogeneity of the physical findings contrasts with uniform verbal reports in interviews of having undergone a ritual of female genital surgery.

Adolescent↗
PubMed1998

An identical novel mutation in BRCA1 and a common haplotype in familial ovarian cancer in non-Ashkenazi Jews.

Unique germline mutations in BRCA1 and BRCA2 account for inherited predisposition to breast and ovarian cancer in high-risk families. In Jewish high-risk individuals of Ashkenazi (east European) descent, three predominant mutations, 185delAG and 5382insC (BRCA1) and 6174delT (BRCA2), seem to account for a substantial portion of germline mutations, and two of these mutations (185delAG and 6174delT) are also found at about 1% each in the general Jewish-Ashkenazi population. We identified a novel BRCA1 mutation in two Jewish-non-Ashkenazi families with ovarian cancer: a thymidine to guanidine alteration at position 3053, resulting in substitution of tyrosine at codon 1017 for a stop codon (Tyr1017Ter). The mutation was first detected by protein truncation test (PTT) and confirmed by sequencing and a modified restriction digest assay. Allelotyping of mutation carriers using intragenic BRCA1 markers revealed that the haplotype was identical in these seemingly unrelated families. No mutation carrier was found among 118 unselected Jewish individuals of Iranian origin. Our findings suggest that this novel mutation should be incorporated into the panel of mutations analysed in high-risk families of the appropriate ethnic background, and that the repertoire of BRCA1 mutations in Jewish high-risk families may be limited, regardless of ethnic origin.

Adult↗
PubMed1995

Genetic analysis of idiopathic torsion dystonia in Ashkenazi Jews and their recent descent from a small founder population.

We have examined data on six closely linked microsatellite loci on chromosome 9q34 from 59 Ashkenazi Jewish families with idiopathic torsion dystonia (ITD). Our data show that the vast majority (> 90%) of early-onset ITD cases in the Ashkenazi population are due to a single founder mutation, which we estimate first appeared approximately 350 years ago. We also show that carriers preferentially originate from the northern part of the historic Jewish Pale of settlement (Lithuania and Byelorussia). The recent origin of this dominant mutation and its current high frequency (between 1/6,000 and 1/2,000) suggest that the Ashkenazi population descends from a limited group of founders, and emphasize the importance of genetic drift in determining disease allele frequencies in this population.

Alleles↗
PubMed1993

A common mutation in the FACC gene causes Fanconi anaemia in Ashkenazi Jews.

Fanconi anaemia is an autosomal recessive disease for which four known complementation groups exist. Recently, the gene defective in complementation group C (FACC) has been cloned. In order to determine the fraction of Fanconi anaemia caused by FACC mutations, we used reverse transcription PCR and chemical mismatch cleavage (CMC) to examine the FACC cDNA in 17 FA cell lines. 4/17 patients (23.5%) had mutations in this gene. Two Ashkenazi-Jewish individuals were homozygous for an identical splice mutation. Three additional Jewish patients bearing this allele were found upon screening 21 other families. We conclude that a common mutation in FACC accounts for the majority of Fanconi anaemia in Ashkenazi-Jewish families.

Alleles↗
PubMed2001

APC I1307K increases risk of transition from polyp to colorectal carcinoma in Ashkenazi Jews.

BACKGROUND & AIMS: The I1307K allele of the APC gene has been shown to confer a modestly elevated risk of colorectal cancer in the Ashkenazi Jewish population (relative risk, 1.5-1.7). However, it is unclear whether the alteration predisposes to adenomas and whether the genetic information can be used in clinical practice. To further address the pathogenic significance of I1307K, we offered both a genetic test and a screening program to individuals considered to be at increased risk for colorectal cancer. We compared the prevalence of polyps and their characteristics between carriers and noncarriers. METHODS: Invitations to participate in a DNA and colonoscopy screening program were mailed, together with a family questionnaire, to 3540 households forming the Jewish Community in Ottawa. The I1307K variant was analyzed in 242 eligible respondents who were selected because they had a personal or family history of colon cancer. Nearly 80% of these respondents (n = 189; age range, 32-83 years) consented to undergo a single colonoscopic examination. RESULTS: The overall carrier frequency of I1307K in the study group was 10.3%. A higher proportion of heterozygous gene carriers was found in the subgroup of colon cancer survivors (27%) than among asymptomatic individuals (8%, P < 0.02). A total of 59 polyps were identified in 44 subjects. Histologically confirmed adenomatous polyps were diagnosed in 11.8% of carriers and 12.8% of noncarriers (P > 0.5). No significant differences in polyp size, multiplicity, location, degree of villosity, or age-dependent prevalence were found between the 2 groups of participants. CONCLUSIONS: The high frequency of I1307K colorectal cancer patients found in the Ashkenazi Jewish community of Ottawa and the equivalent proportion of carriers and noncarriers who developed adenomatous polyps suggest that in this community, I1307K is associated with a significant predisposition to carcinoma but not adenoma.

Adenomatous Polyps↗