Israel Medical Association Journal

The issue of genital ulcers (GUs) in Israeli Arab female patients with Behçet's disease (BD is important as GUs are considered a unique feature of BD and stand as diagnostic criterion for the diagnosis in the International Study Group (ISG) criteria [1] and the International Criteria for Behcet Disease (ICBD) [2]. According to the ISG, GUs can be detected by a physician or by the patient [1]. While oral ulcers are easily observable, the identification of more hidden GUs pose a significant challenge.

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.

Since the introduction of the international study group (ISG) criteria for the diagnosis of Behçet's disease (BD) in the early 1990s by Yazici and colleagues [1] and the international criteria for BD (ICBD) by Davatchi and colleagues in 2014 [2], great progress has been achieved in the diagnosis of BD with fairly high sensitivity and specificity rates. However, a small, but very challenging and unique minority might not fulfill these criteria, at least at presentation. These patients are most challenging as they may present with life-threatening vascular or neurological manifestations. If the diagnosis BD is delayed, the risk for morbidity and even mortality might be increased. Therefore, we should aim for early diagnosis and prompt treatment.

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: Lung cancer is the most common cause of cancer-related death.

Objectives: To identify changing patterns of lung cancer and its histologic subtypes among different population groups in Israel over a 25 year period.

Methods: Primary lung cancers, all types and all stages, diagnosed during 1990–2014 were recorded in the Israel National Cancer Registry database. Demographic information was retrieved from the National Population Register. Age-standardized rates for the different subgroups were calculated for each year. Joinpoint software was used to analyze trends in incidence.

Results: We identified 42,672 lung cancer cases. The most common histology was adenocarcinoma (34%), followed by squamous cell carcinoma (19%), large cell/not-otherwise-specified (19%), other histologies (15%), and small cell lung cancer (11%). The adenocarcinoma incidence rose from 25.7% to 48.2% during the examined period. Large cell/not-otherwise-specified incidence peaked around 2005–2006 and declined after. Lung cancer incidence increased significantly for the population overall and specifically in Arab females, followed by Jewish females and by Arab males. Adenocarcinoma and small cell lung cancer increased in Jewish females and in Arab males. A younger age of diagnosis was seen in Arab compared to Jewish patients.

Conclusions: Jewish females and Arab males and females living in Israel demonstrated a constant increase in lung cancer incidence, mostly in adenocarcinoma and small cell lung cancer incidence. In addition, a younger age of diagnosis in Arabs was noted. Smoking reduction interventions and screening should be implemented in those populations.

Background: Temporal trends in the incidence of inflammatory bowel disease (IBD) in the Arab and Jewish populations in Israel have been poorly described.

Objectives: To compare the annual incidence and prevalence rates of Crohn's disease (CD) and ulcerative colitis (UC) in the Arab and Jewish populations in Israel between the years 2003 and 2008.

Methods: We applied a common case identification algorithm to the Clalit Health Services database to both determine trends in age-adjusted incidence and prevalence rates for IBD in both populations during this period and estimate the burden of IBD in Israel.

Results: The incidence of CD in the Arab population increased from 3.1/100,000 in 2003 to 10.6/100,000 person-years in 2008, compared with a decrease in the Jewish population from 14.3/100,000 to 11.7/100,000 person-years for the same period. The incidence of UC in the Arab population increased from 4.1/100,000 in 2003 to 5.0/100,000 person-years in 2008, a low but stable rate, compared with a decrease from 16.4/100,000 to 9.5/100,000 person-years for the same time period in the Jewish population. The prevalence of both diseases increased due to the accumulation of incident cases but remained much lower among Arabs.

Conclusions: Understanding the factors underlying the differences in incidence and prevalence of IBD in the Jewish and Arab populations may shed light on the genetic and environmental factors associated with these diseases.

Background: The epidemiology of human brucellosis (HB) continues to evolve.

Objectives: To describe the current epidemiology of HB in Israel in general and in the population at risk.

Methods: We calculated the incidence of HB in Israel for the period 2009–2015, overall and for the Arab population. Data are based on mandatory reporting of HB in Israel, defined clinically with either laboratory confirmation or epidemiological linkage to a laboratory-confirmed case. We mapped the geographic distribution of HB throughout the study period according to localities. We specified localities with high incidence (≥ 10 per 100,000 population) and mapped the distribution of dense localities with time.

Results: The incidence of HB in the general population in Israel increased sharply from 1.9 per 100,000 in 2009 to a peak of 7.3 per 100,000 in 2014. Each year, 95–100% of cases occurred among Arabs, thus the incidence in the Arab population increased from 10 per 100,000 in 2009 to 33.5 per 100,000 in 2014. Throughout this period 133 different localities reported at least one case of HB, and of these 20 were high-incidence localities during one year at least. During the period 2009–2013 the number of affected localities ranged from 35 to 44 per year and the disease was local, while in 2014 there were 82 localities distributed across the country.

Conclusions: We demonstrate the importance of analyzing incidence in the population at risk for a disease. HB is an urgent public health issue in the Arab population in Israel, mandating an immediate and long-term eradication and control program.

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: The recommendation of the U.S. Centers for Disease Control and Prevention regarding universal screening for Group B Streptococcus (GBS) at 35–37 weeks gestational age in pregnancy is not accepted in Israel. The National Council for Obstetrics, Neonatology and Genetics recommends intrapartum prophylaxis, mainly based on risk factors, to prevent early neonatal GBS infection. This policy is based on past studies demonstrating low colonization rates of the bacteria in Israeli pregnant women and very low neonatal sepsis rates.

Objectives: To determine the applicability of the high-risk group prophylaxis policy for Arab Israeli pregnant women.

Methods: Vaginorectal swabs from Arab Israeli pregnant women who attended the labor ward between October 2015 and February 2016, were obtained before any pelvic examination for GBS identification using Quidel’s AmpliVue® GBS assay. Women who tested positive received intrapartum antibiotic prophylaxis to prevent neonatal infection. Obstetric data were collected from each woman from a standardized questionnaire. Data regarding the delivery and neonates were collected as well.

Results: The study comprised 188 Arab pregnant women who met the inclusion criteria and signed a consent form to participate in the study. Of these, 59 had positive tests, and a carriage rate of 31%. No neonatal colonization of GBS was found.

Conclusions: The carrier rate in Arab pregnant women in northern Israel is higher than the national average, at least partially due to the more sensitive method of GBS detection used in the present study.

Background: Coronary artery disease (CAD) has known risk factors. Individual risks related to specific ethnicities are complex and depend on genetic predisposition and lifestyle.

Objectives: To compare the nature and prevalence of risk factors in Arab and non-Arab ethnic patients with symptomatic obstructive CAD referred for coronary angiography.

Methods: CAD, defined as coronary angiography with a ≥ 50% narrowing in ≥ 1 vessel, was diagnosed in 1029 patients admitted to a medical center between April 2014 and October 2015. Patients were divided into two groups according to ethnic origin: Arab vs. non-Arab. Demographics, clinical presentation, and coronary risk profiles were compared.

Results: The diagnosis of CAD was made during ST-elevation myocardial infarction (STEMI) in 198 patients (19%) who arrived at the clinic, 620 (60%) with unstable angina/non-STEMI, and 211 (21%) with stable angina. Patients with symptomatic CAD and Arab ethnicity were 47% more prevalent than non-Arab patients presenting with CAD. The Arab patients were appoximately 5 years younger, 50% more likely to be active smokers, 25% more likely to be obese, and more likely to have a family history of CAD. Other coronary risk factors were similar between the two groups.

Conclusions: Smoking and obesity, which are potentially modifiable CAD risk factors, stood out as major risk factors, in addition to genetic disposition, among Arab and non-Arab patients with symptomatic CAD. Screening and educational interventions for smoking cessation, obesity control, and compliance to treatment of co-morbidities should be attempted in order to decrease CAD in the Arab population.

Background: Gastrointestinal malignancies comprise a broad spectrum of neoplasms and have a high overall incidence. The incidence rates in Israel vary among ethnic groups due to different risk factors.

Objectives: To investigate incidence trends of these cancers in Israel in both Jewish and Arab ethnic groups in order to better understand the risks in those groups.

Methods: This study is based on data published by the Israel National Cancer Registry and the Central Bureau of Statistics. We compared statistics between ethnicities and genders. We examined the eight most common gastrointestinal cancers, focusing on colon, rectal and gastric cancers.

Results: Between 1980 and 2012 there was a decline in the incidence of gastric cancer in the Jewish population; in contrast, a significant increase occurred in Arab women, but there was no significant change in Arab men. Colon cancer showed a relative decrease in incidence in the Jewish population, but an increase in the Arab population. A decrease in the incidence of rectal cancer in the Jewish population and an increase in the Arab population was observed. 

Conclusions: Gastric, colon and rectal cancers exhibit differences in incidence and outcome between Jewish and Arab populations in Israel. These differences were not observed in the other five types of less common gastrointestinal cancers.

 

Background: Studies in lung transplantation demonstrate that the ancestry and gender dissimilarities of donor–recipients lead to a decrease in survival of the recipient. 

Objectives: To evaluate the survival of lung transplant recipients in Israel based on whether the donors and recipients are of Jewish or Arab ancestry as well as survival based on gender match or mismatch.

Methods: We performed a retrospective observational cohort study of 345 lung transplant recipients at the Rabin Medical Center, Petah Tikva, Israel between January 1997 and January 2013. We compared the survival of lung transplant recipients in two ancestry categories: ancestry matched (Jewish donors to Jewish recipients or Arab donors to Arab recipients) and ancestry mismatched (Jewish donors to Arab recipients and vice versa). We also compared the survival among the four gender donor and recipient combinations (male to male, female to female, male to female, and female to male). 

Results: Survival analysis revealed no significant differences between the two ancestry groups (P = 0.51) and among the four gender combinations (P = 0.58). On Cox multivariate analysis, younger donor age was the only significant parameter for longer survival (hazards ratio 1.025, 95% confidence interval 1.012–1.037).

Conclusions: Gender and ancestry mismatches in these two Israeli populations do not appear to alter the clinical outcomes following lung transplantation.

 

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.

 

Background: The detection and correction of refractive errors is one of the priorities of the World Health Organization Initiative Vision 2020.

Objectives: To determine the factors related to a child having an ocular abnormality (poor vision, refractive error or other abnormality) among schoolchildren in northern Israel.

Methods: A cross-sectional population-based study was conducted among 2113 students aged 6-7 and 13-14 years old in 70 schools in northern Israel. Medical examination included vision history, clinical eye examination and vision testing. If a parent’s informed consent was available, eye drops (cycloplegia) were delivered for fundus and retinoscopy testing. An ophthalmologist was asked to determine the need for the child’s referral for further diagnostic procedures, treatment and/or follow-up. Multivariate analysis was limited to 1708 children, using data pertaining to the ophthalmologist’s decision regarding referral, as well as vision and retinoscopy results.

Results: Vision and/or ocular abnormality was prevalent in 21.5% (95% confidence interval 17.4–26.6%), predominantly among 13-14 year olds and Jewish children. Abnormal clinical findings were found in 5.7% of the students. Retinoscopy showed a higher prevalence of hypermetropia among 6-7 year olds and a higher prevalence of myopia and astigmatism among the 13-14 year olds. The multivariate analysis suggests an independent effect of retinoscopy abnormality (odds ratio = 3.85), vision abnormality (OR [1]= 2.42), Jewish ethnicity (OR = 1.62) and 13-14 year old age group (OR = 1.26) on the ophthalmologist’s referral decision.

Conclusions: Vision and/or ocular abnormality is an important health problem among schoolchildren in northern Israel. The independent effect of ethnicity and age on the ophthalmologist’s referral decision should be further explored.