Israel Medical Association Journal

Background: Behcet's syndrome (BS) is a multisystem syndrome that typically manifests as recurrent oral and genital ulcers, as well as other systemic manifestations. Few studies describing the characteristics of BS among Israeli patients have been published.

Objectives: To describe the characteristics of BS patients and to compare Jewish and Arab subpopulations.

Methods: We retrospectively reviewed electronic medical records and extracted demographic, clinical, laboratory, and medication data for each patient. We compared the Jewish and Arabic BS patients.

Results: The cohort included 98 patients. Males constituted 49 (50%); mean age at the time of diagnosis was 29.9 years; 71 (72.4%) were Arab and 27 (27.6%) were Jewish. Oral ulcers were evident in 93 patients (94.9%) and genital ulcers in 54 (55.1%). Involvement of the skin, joints, eyes, gastrointestinal tract, and neurologic and vascular systems were demonstrated among 42 (42.9%), 57 (58.2%), 47 (48.0%), 8 (8.2%), 10 (10.2%), and 15 (15.3%), respectively. HLA B51 was positive in 24 of 37 (64.9%). Pathergy was positive in 8 of 12 (66.7%). Colchicine was used in 82 (83.7%), azathioprine 47 (48%), methotrexate 16 (16.3%), apremilast 10 (10.2%), cyclosporine-A 8 (8.2%), adalimumab 26 (26.5%), infliximab 12 (12.2%), cyclophosphamide 1 (1.0%), tocilizumab 2 (2.0%), and anti-coagulation 6 (6.1%). The Arab and Jewish subpopulations were significantly different regarding male proportion, 40 (56.3%) vs. 9 (33.3%), P = 0.042.

Conclusions: BS is more common among Arabs in northern Israel, but no significant clinical or demographic differences were found except for a higher proportion of male patients among Arabs.

Background: The lifestyle of the Arab population in Israel has changed in the last few decades, and modernization and urbanization have impacted the prevalence of chronic diseases.

Objectives: To investigate the prevalence of chronic diseases in the Arab population compared to the Jewish population in Israel.

Methods: This retrospective study included Arab and Jewish people insured by Israel’s largest health maintenance organization. Demographic data and data regarding chronic diseases were collected. Crude prevalence and age group adjusted prevalence were calculated.

Results: In total, 863,116 Arab and 3,674,863 Jewish people were included in the analysis. We found that 18.3% of the Arab population had a diagnosis of diabetes mellitus and 28.8% had obesity compared to 17.5% and 22.5% in the Jewish population, P < 0.001, respectively. The prevalence of chronic heart failure, chronic ischemic heart disease, cerebrovascular accidents, hypertension, and myocardial infarction among Arabs was higher in all age groups compared to Jewish patients. Arab males had higher frequency rates of obesity and hemodialysis treatment compared to Jewish males. The proportion of women with diabetes mellitus, hemodialysis treatment, iron deficiency anemia, or obesity was greater among Arab females.

Conclusions: Significant differences were found in the prevalence of chronic diseases among Arab and Jewish patients in Israel. Culturally relevant interventions are crucial for disease prevention, early diagnosis, and management of chronic diseases among different ethnic groups.

Background: Hidradenitis suppurativa (HS) is a chronic inflammatory skin disease involving apocrine gland-bearing regions. There is an under-representation of non-Caucasians in epidemiologic studies of HS. The characteristics of HS in Israeli Arabs have not yet been studied.

Objectives: To investigate the demographic and clinical profile of HS in the Israeli Arab population.

Methods: A retrospective analysis was conducted in two cohorts of patients with HS in Israel. The patients were derived from the database of a large health management organization (n=4191, 639 Arabs; population-based) and a major tertiary medical center (n=372, 49 Arabs). Demographic and clinical data were compared between ethnic groups.

Results: The prevalence of HS in Israeli Arabs was found to be 0.5%, fivefold higher than in Jews. Arab patients were younger (35.3 vs. 40.5 years, P < 0.001) and mostly male (52% vs. 35.7%, p < 0.001), with lower rates of co-morbidities, including smoking (40.8% vs. 55.7%, p < 0.001), hyperlipidemia, and depression as well as a higher rate of dissecting cellulitis (10.2% vs. 1.9%, p = 0.008). HS was more severe in Arabs, but of shorter duration, with mainly axillary involvement (79.6% vs. 57.9%, p = 0.004). Treatment with hormones was more common in Jews, and with biologic agents in Arabs.

Conclusions: The findings suggest a different phenotype of HS in Arabs, warranting further study.

Background: In Israel, breast cancer prevalence is lower among Arab than Jewish women, but incidence is increasing among Arab women at a younger age.

Objectives: To explore differences between Arab and Jewish women with breast cancer with respect to age at diagnosis, associated risk factors, and use of hormonal medications.

Methods: We conducted a retrospective database study comparing Arab and Jewish women with breast cancer focusing on age at diagnosis, smoking history, obesity, and previous hormonal medication usage, including oral combined contraceptive pills (OCCP), progestogens, hormonal medications for treatment of infertility, and hormone replacement therapy (HRT).

Results: The study included 2494 women who were diagnosed with breast cancer during 2004–2015. Age at diagnosis was lower among Arab women (50.7 ± 13.1 years vs. 55.4 ± 12.6 years, P < 0.0001). The rate of smoking was higher among Jewish women (16.0% vs. 4.3%, P < 0.0001). The rate of obesity was higher in Arab women older than 50 years at diagnosis (59.0% vs. 42.4%, P < 0.0001). Arab women demonstrated a lower overall chance of previous use of all types of hormonal medications (odds ratio [OR] 0.6, 95% confidence interval [95%CI] 0.6–0.8) compared to Jewish women. Arab women were more likely to have used progestogens (OR 1.7, 95%CI 1.4–2.2) and medications for treatment of infertility (OR 2.3, 95%CI 1.5–3.4) and less likely OCCP (OR 0.4, 95%CI 0.3–0.6) and HRT (OR 0.4, 95%CI 0.3–0.5).

Conclusions: Previous use of hormonal medications may contribute to incidence of breast cancer in Arab women.

Background: Hookah smoking is a common activity around the world and has recently become a trend among youth. Studies have indicated a relationship between hookah smoking and a high prevalence of chronic diseases, cancer, cardiovascular, and infectious diseases. In Israel, there has been a sharp increase in hookah smoking among the Arabs. Most studies have focused mainly on hookah smoking among young people.

Objectives: To examine the association between hookah smoking and socioeconomic characteristics, health status and behaviors, and knowledge in the adult Arab population and to build a prediction model using machine learning methods.

Methods: This quantitative study based is on data from the Health and Environment Survey conducted by the Galilee Society in 2015–2016. The data were collected through face-to-face interviews with 2046 adults aged 18 years and older.

Results: Using machine learning, a prediction model was built based on eight features. Of the total study population, 13.0% smoked hookah. In the 18–34 age group, 19.5% smoked. Men, people with lower level of health knowledge, heavy consumers of energy drinks and alcohol, and unemployed people were more likely to smoke hookah. Younger and more educated people were more likely to smoke hookah.

Conclusions: Hookah smoking is a widespread behavior among adult Arabs in Israel. The model generated by our study is intended to help health organizations reach people at risk for smoking hookah and to suggest different approaches to eliminate this phenomenon.

Background: Inflammatory bowel disease (IBD) prevalence is increasing among Bedouin Arabs in Israel. This population is known to have a high rate of consanguinity. NOD2/CARD15 mutations are well-studied in IBD.

Objectives: To investigate the frequency of NOD2/CARD15 mutations in IBD Bedouin patients and their relevance to disease phenotype.

Methods: The IBD-Arab cohort in southern Israel included 68 patients, of which 25 Crohn's disease (CD) patients and 25 ulcerative colitis (UC) patients consented to participate (72%). Blood samples were obtained from all participants who were genotyped for NOD2/CARD15 variants Arg702Trp, Gly908Arg, and Leu1007fsinsC.

Results: The NOD2/CARD15 mutation frequency was higher in Crohn's disease than in ulcerative colitis patients. Carrier frequency for the Gly908Arg mutation in CD and UC patients was 8/25 (32%) and 3/25 (12%), respectively (P = 0.08). Neither the Arg702Trp nor Leu1007fsinsC mutation was found in our cohort. No homozygous/compound heterozygote mutations were found. Genotype-phenotype analysis revealed that CD patients carrying the Gly908Arg mutation were younger at diagnosis, 22.8 ± 4.5 vs. 28.82 ± 9.1 years (P = 0.04). All carriers were males, compared with 41.2% in non-carriers (P = 0.005). NOD2/CARD15 mutation carriers with UC were older, 67.0 ± 24.5 years compared with 41.2 ± 12.3 years (P = 0.006). No other associations regarding disease localization or other clinical parameter were found.

Conclusions: The frequency of NOD2/CARD15 gene mutations is high in CD and UC among Bedouin Arab IBD patients and is associated with younger age at onset in CD and male gender.

Background: Obstructive sleep apnea (OSA) is a common health problem with an estimated prevalence of 4% among men, many of whom are undiagnosed and untreated. 

Objectives: To compare demographic characteristics, health profiles, risk factors, and disease severity in Arab and Jewish men with OSA syndrome.

Methods: In this cross-sectional study we retrospectively analyzed clinical data from the medical files of men ≥ 22 years old who were referred to the Rambam Medical Center sleep clinic during the period 2001–2009 with a suspected diagnosis of OSA. OSA severity was measured using the apnea-hypopnea index (AHI). Categorical variables were compared using the chi-square test. Relations between OSA severity and a set of independent risk factors were assessed by linear regression analysis.

Results: A total of 207 men were included (39 Arabs, 19%; 168 Jews, 81%). Arab participants were younger than their Jewish counterparts (45.5 ± 8.9 years vs. 49.8 ± 11.8, P = 0.04) and their body mass index (BMI) was higher (33.1 ± 5.1 vs. 30.0 ± 4.4, P = 0.001). OSA severity (AHI score) was higher among Arab men, with low, medium and high severity scores seen in 10%, 33% and 56% of Arab men vs 35%, 29% and 37% of Jewish men, respectively [T(198)=2.39, P = 0.02]. Mean blood oxygen saturation was comparable.

Conclusions: Arab men presenting for evaluation of sleep apnea harbored more severe OSA symptoms, were younger, and had higher BMI compared to Jewish men. Since OSA syndrome evolves for several years until it becomes severe, these findings suggest that Arab men seek medical assistance later than Jewish men with OSA.

 

Abstract:

Background: Waterpipe tobacco smoking (WTS) is common in some populations and may add increased risk for tobaccorelated diseases.

Objectives: To assess the rates of WTS and risk practices associated with WTS in three distinct populations in Israel: long-term Jewish residents (LTJR), immigrants from the former Soviet Union (fSU), and Arabs.

Methods: We conducted a cross-sectional survey of 899 randomly selected participants, age 30–65 years, using face-toface interviews with subjects from the three population groups in Israel. Respondents reported WTS, cigarette smoking, alcohol consumption, and socioeconomic characteristics.

Results: Among men, WTS at least once a week was reported by 4.8% of LTJR, 3.2% of fSU immigrants and 20.3% of Arabs. Lower rates were reported among women of all groups. The younger, less educated men and the younger unmarried women had higher odds of WTS. LTJR who smoked cigarettes and drank alcohol had higher odds of WTS [odds ratio (OR) 32.6, confidence interval (CI) 9.36–113.6; OR = 3.57, CI =1.48–8.63, respectively], compared to non-smokers and non-drinkers. fSU immigrants who smoked cigarettes had higher odds of WTS (OR = 3.40, CI = 0.99–11.7) compared to non-smokers. Among Arabs, cigarette smoking and alcohol consumption were not associated with WTS.

Conclusions: Arabs are more likely than other Israeli populations to engage in WTS. This behavior may add to increased inequalities in rates of tobacco-induced diseases between Arabs and Jews in Israel. Including WTS in the policies for smoke-free public places is called for.

Background: Orofacial clefts are the most common craniofacial congenital malformations, with significant anatomic, ethnical, racial and gender differences.

Objectives: To investigate the prevalence, distribution and characteristic features of various types of non-syndromic clefts among Israeli Jews and Arabs.

Methods: We conducted a retrospective multi-center survey in 13 major hospitals in Israel for the period 1993–2005. To obtain the true prevalence and detailed clinical characteristics, data on liveborn infants with non-syndromic clefts were obtained from the Ministry of Health's National Birth Defect Registry and completed by chart reviews in the 13 surveyed hospitals.

Conclusions: The prevalence of non-syndromic clefts was 7.00/10,000 live births. The markedly higher rate in Arabs is related to the high rate of consanguinity. Both very young and old maternal age represents a higher risk of clefts in their offspring. 

Objectives: To compare the incidence rate of overall and site-specific cancers among Israeli Arabs with T2DM to that of Israeli Arabs without.

Methods: A retrospective cohort study of all adult Arab members of Clalit Healthcare Services in northern Israel was conducted over a 10 year period (1999–2008).

Results: During the study period 752 and 2045 incident cases of cancer were diagnosed among 13,450 adults with diabetes and 74,484 without, respectively. The follow-up time involved 817,506 person-years. Diabetes was associated with a standard incidence ratio (SIR) of 3.27 (95%CI 1.49–5.05) and 2.87 (95%CI 1.25–4.50) for pancreatic cancer in men and women, respectively. A significantly reduced SIR (0.67, 95%CI 0.36–0.99) was observed for esophageal, stomach and intestinal cancers in men.

Conclusions: Our findings support an association between T2DM and increased risk of cancer of the pancreas in Arab men and women. A significantly reduced risk of all other cancers was observed only in Arab men. Our findings underscore the need for effective diabetes and cancer prevention and intervention programs. 

Background: During the last few decades much effort has been invested into lowering smoking rates due to its heavy burden on the population's health and on costs for the health care services.

Objectives: To compare trends in smoking rates between adult Arab men and Jewish men and women during 2000–2008.

Methods: Six random telephone surveys were conducted by the Israel Center for Disease Control in 2000–2008 to investigate smoking rates. The number of respondents was 24,976 Jews men and women and 2564 Arab men. The percent of respondents reporting being current smokers was calculated for each population group (Jews and Arabs) by age, gender and education, and were studied in relation to time.

Results: Among Jewish men aged 21–64 smoking declined during 2000–2008 by about 3.5%. In the 21–44 age group this decline occurred only among respondents with an academic education. Among Jewish women this decline also occurred at ages 21–64, and in the 45–64 age group this decline was due only to a decline in smoking among those with an academic education. Among Arab men aged 21–64 an increase in smoking rates of about 6.5% was observed among both educated and less educated respondents.

Conclusions: Smoking prevalence is declining in Israel among Jews, but not among Arab men. The larger decrease in smoking rates among academics will, in the future, add to the inequalities in health between the lower and higher socioeconomic status groups and between Arabs and Jews. This calls for tailored interventions among the less educated Jews and all Arab men.

Background: Ultrasound examination of the fetus enables diagnosis of many major malformations during pregnancy, providing the possibility to consider interruption of the pregnancy. As a result, in many cases the incidence of malformations at birth does not represent their true incidence.

Objectives: To determine the impact of prenatal diagnosis and termination of pregnancy on the relative incidence of malformations at birth among Jews and Muslim Arabs in Israel.

Methods: Data on selected major malformations in 2000–2003 were collected from the two large central databases of the Ministry of Health and the Central Bureau of Statistics which contain information regarding births, stillbirths and terminations of pregnancies.

Results: For many malformations the total incidence was much higher than the incidence at birth. For almost all of the malformations studied, the total incidence was higher in Muslims than in Jews and the differences were further accentuated among the liveborn because of the differences in the rate of pregnancy terminations.

Conclusions: In order to detect possible influences of environmental or genetic factors on major malformations in Israel, it is critical to look at data including pregnancy terminations, stillbirths and live births.

Background: Age-related macular degeneration is the most common cause of legal blindness in the developed world including Israel. Ethnic background is a risk factor for advanced AMD[1] in several populations, however the relative prevalence of this disease in different ethnic groups in the Middle East is unknown.

Objectives: To compare the prevalence of advanced AMD in Arabs and Jews in Israel.

Methods: We performed a retrospective analysis of two independent groups of patients: the first group comprised a sequential series of Jerusalem residents who underwent photodynamic therapy for neovascular AMD (PDT[2] group), and the second group consisted of all individuals in Jerusalem who received a blind certificate due to AMD (legal blindness group). Control groups were assessed to exclude inherited ethnic associated bias in the two study groups.

Results: The PDT group included 146 patients: 142 were Jews (97.3%) and 4 were Arabs (2.7%). The legal blindness group included 340 Jerusalem residents: 326 Jews (96%) and 14 Arabs (4%). The number of Arab AMD patients in the two groups was lower than expected based on the ethnic composition of the age-matched Jerusalem population (P = 0.0002 for the PDT group, and P < 0.0001 for the legal blindness group). By contrast, the number of non-AMD Arab patients who were treated in the same clinic and the number of Arabs who received a blind certificate for diabetic retinopathy was not different from expected based on their relative number in the Jerusalem population.

Conclusions: Advanced AMD is less common in the Arab than the Jewish population of Jerusalem. Genetic and environmental factors may account for this difference. A population-based study is required to assess the overall prevalence of AMD in Jews and Arabs.

Background: Arabs in Israel have high morbidity and mortality from diabetes and cardiovascular disease. Obesity is a risk factor for both conditions.

Objectives: To investigate the prevalence of obesity (body mass index > 30 kg/m²), subjects' knowledge and behaviors, and their reports on practices of health-care professionals regarding body weight among Arabs and Jews.

Methods: The study participants (n=880) were randomly sampled from the urban population of the Hadera district in Israel. Data on demographic, socioeconomic and lifestyle characteristics; reports on height, current body weight and body weight at the age of 18 years; knowledge and behavior; and health-care professionals' practices with regard to body weight were obtained by interview. Anthropometric measurements were performed subsequently.

Results: Information on BMI[1] was available on 868 participants (49% Arabs, 49% women, median age 46 years). Although the median BMI did not differ significantly between Arabs and Jews at age 18, the prevalence of current obesity was 52% in Arab women compared to 31% in Jewish women (P < 0.001), and 25% in Arab men compared to 23% in Jewish men (P = 0.6). On multivariate analysis, obesity was significantly associated with age, BMI at the age of 18 years, leisure time physical activity and cigarette smoking, but not with ethnicity. Fewer Arabs reported measuring their body weight and Arab women were less frequently advised to maintain an active lifestyle.

Conclusions: The high prevalence of obesity among Arab women may be explained by lifestyle characteristics. Prevention of obesity in Arabs should be directed at women and should start preferably before adulthood.