Jacob Haviv

Tel Aviv University, Tell Afif, Tel Aviv, Israel

Are you Jacob Haviv?

Claim your profile

Publications (11)11.97 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: Identification of children at risk for adolescent overweight can assist in targeting interventions. Uncertainty remains regarding the validity of current body mass index (BMI) reference values in predicting future risk on a population basis. This study aimed to assess the validity of current childhood adiposity classifications in predicting adolescent overweight and obesity among Israeli youth. Historical cohort study. School-based childhood health studies and adolescent physical examinations. A total of 3 163 subjects surveyed first at age 8-15 and again at age 17-19. Age, sex, height, weight and BMI. Sensitivity, specificity, positive and negative predictive values, and relative risk of childhood adiposity classification. Childhood overweight and obesity showed low sensitivity and high specificity for predicting adolescent overweight and obesity. Positive predictive values were low and varied by age and sex, but negative predictive values were consistently high in both sexes and all ages (range 0.85-0.99). After adjusting for age and sex, both childhood overweight and obesity substantially increased the risk of adolescent overweight (relative risk [RR] 7.03 and 7.20, respectively) and adolescent obesity (RR 24.34 and 28.41, respectively). Childhood overweight and obesity are strong risk factors for adolescent overweight and obesity among Israeli youth. Normal weight children were at very low risk for adolescent overweight. These findings suggest that population-based health promotion aimed at maintaining normal weight among children should be given preference over risk-guided approaches targeting weight reduction among obese children.
    International journal of pediatric obesity: IJPO: an official journal of the International Association for the Study of Obesity 05/2010; 5(3):250-5. · 2.00 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Obesity is a well-recognized risk factor for many chronic diseases. Pediatric overweight is an especially severe problem because its childhood onset increases the overall length of exposure to the detrimental effects of overweight, accelerates the onset of chronic disease, and affects children's physical, psychological, and social development. Several parental traits have been shown to be associated with an increased risk for childhood overweight. In our study, we quantified the mutual effects of parental education and smoking on the risk of filial overweight in a large population-based sample of Israeli schoolchildren, adjusting for the effects of age, sex, and immigration status. Data were collected in 1997 and 2000 from 8623 Israeli schoolchildren aged 8 to 13 years in two cross-sectional samples. Overweight was defined as body mass index (BMI) of greater than the 85th percentile for age and sex, and severe overweight was defined as BMI greater than the 95th percentile for age and sex. Mean BMI was positively associated with number of parental smokers for a child. Parental smoking was an independent risk factor for both overweight and severe overweight, with a dose-response relationship between the number of parental smokers and the risk of filial overweight. Children whose parents did not attend college were at increased risk for overweight (odds ratio [OR], 1.21; 95% confidence interval [CI], 1.03-1.42) and severe overweight (OR, 1.49; 95% CI, 1.09-2.05) compared with children whose parents both attended college. Children with one college-educated parent were at increased risk for severe overweight (OR, 1.31; 95% CI, 1.004-1.71) compared with children whose parents both attended college. Parental education and smoking are independent risk factors for filial overweight. Children of less-educated, smoking parents should be targeted for overweight prevention and intervention efforts. These findings should also be included as key messages in adult smoking prevention and cessation campaigns. Parents who smoke should be warned that not only is their own health at stake, but their children are also at increased risk for overweight and its associated diseases.
    Preventing chronic disease 05/2006; 3(2):A48. · 1.82 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: To analyze trends in childhood body mass index (BMI) in Israel between 1990 and 2000, and to determine the proportion of obese children using US and population-specific reference values. Cross-sectional data from 13 284 second- and fifth-grade schoolchildren were collected, including age, sex, height, weight, country of birth, and time since immigration. Age- and sex-specific BMI means and centiles were calculated, and the prevalence of obesity was determined using Israeli and US reference values. BMI values at the 95th centile increased monotonously over time in all age and sex categories. Between 1990 and 2000, 95th centile values increased by 12.7% and 11.8% among second-grade boys and girls, respectively. Among fifth-grade children, 95th centile values increased by 10.2% and 8.4%, respectively. Among second graders in 2000, 11.4% of both boys and girls exceeded the BMI value recorded at the 95th centile in 1990. Among fifth-graders in 2000, 10.7% of boys and 11.1% of girls exceeded the 1990 BMI reference value (p for all comparisons < 0.001). The proportion of obese children increased over time using both Israeli and US reference values. This substantial increase in childhood obesity poses a serious health threat, and requires implementation of suitable public health interventions.
    Acta Paediatrica 04/2006; 95(4):444-9. · 1.97 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Pediculosis capitis and pubis are not mandatorily reported diseases in most countries. Thus, the reported rates of these diseases in large populations are usually inaccurate and based on estimations. To describe the global epidemiology of pediculosis capitis and pubis in the Israeli Defense Force. We analyzed the data obtained from the routine and mandatory reporting of every individual case of pediculosis capitis and pubis to the Army Health Branch Epidemiology Department since 1972 and 1973, respectively. During this period, epidemics of pediculosis capitis and pubis were observed between 1973 and 1985 and 1972 and 1987, with 17.7- and 3.9-fold increases in incidence, respectively. These two epidemics were followed by a sharp decline in morbidity (113.6- and 13.6-fold between 1981 and 1999 and 1984 and 1999, respectively) to the present. A number of factors could be responsible for the observed decline in morbidity, e.g. socioeconomic, pharmacologic, environmental, or prevention policy modifications. The rates of pediculosis capitis and pubis have continuously declined since the last epidemic of 1972-1987, indicating the influence of these and possibly other factors.
    International Journal of Dermatology 11/2001; 40(10):637-9. · 1.34 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Background. Postexposure prophylaxis, adequately applied after exposure to a rabid animal, is highly effective in prevention of human disease. Deviations from the recommended vaccination postexposure treatment protocol have been associated with vaccination failure and human mortality. We investigated an incident in which seven Israel Defense Forces soldiers were bitten by a rabid fox and initially treated not in accordance with the recommended vaccination protocol.Methods. The soldiers received modified anti-rabies postexposure prophylaxis, including a higher dosage of both the active and the passive vaccines. The humoral antibody response was monitored subsequently.Results. All soldiers showed a satisfactory increase (above 0.5 UE/ml by ELISA) in serum anti-rabies antibody titers. None developed the disease more than a year after follow-up.Conclusions. Strict adherence to the treatment guidelines following an injury by a rabid animal is of utmost importance. We suggest possible compensatory management after a potentially lethal deviation from protocol.
    Preventive Medicine 08/1999; · 3.50 Impact Factor
  • J Haviv, I Ashkenazi
    Harefuah 05/1999; 136(7):559-64.
  • J Haviv, I Ashkenazi
    Harefuah 04/1999; 136(6):477-82.
  • [Show abstract] [Hide abstract]
    ABSTRACT: Scabies is not a notifiable disease in most countries. Thus, the reported rates of the disease in large populations are usually inaccurate and based on estimations. Scabies is usually reported only when large outbreaks occur. This article describes the global epidemiology of scabies in the Israel Defense Force. The data used in this study are based on the routine and mandatory reporting of every individual case of scabies to the Army Health Branch Epidemiology Department since 1968. There was a period of 13 years of quiescence from the implementation of reporting in 1968 until 1981. This period was followed by an epidemic of 15 years, peaking in 1985 and 1986, and returning to the baseline rates of the quiescent period by 1996. This prospectively observed pattern of at least 13 years of quiescence followed by a peak of 15 years is consistent with other, mostly retrospective, reports. Although the peak may have been triggered by the "Lebanon" war of 1982, it is noticeable that no peak was observed during the "Yom Kippur" war (1973). Prospective, mandatory reporting of the kind described here should help to better understand the epidemiology of scabies.
    International Journal of Dermatology 09/1998; 37(8):586-7. · 1.34 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Soldiers in field units of the Israel Defense Forces (IDF) are susceptible to injury by various poisonous animals during training and operations. Bites and envenomations by animals such as snakes, scorpions, and spiders can be painful and debilitating, and at times life-threatening. We have examined the extent of exposure of IDF soldiers to snake and arthropod bites and the morbidity resulting from these encounters. All reports of IDF soldiers who sought medical attention for snake or arthropod bites between the years 1993-1997 were reviewed at the IDF Medical Corps Headquarters. Monthly distribution of cases was noted for all years, and geographic distribution was studied for all 1997 cases. Over the period 1993-1997 there was a yearly rate of 32-52 physician visits per 100,000 soldiers due to snakebites (mean 43.6/100,000), and 1370-1729 physician visits per 100,000 soldiers due to arthropod bites (mean 1478/100,000). There is a clear overall increase in snake and arthropod bites during the spring and summer months, with a peak in snakebites in May and in arthropod bites in August. 58% of all snakebites in Israel were reported in the central region, with 33% occurring in the south, and 9% in the north of the country. No fatalities due to envenomations have been reported in the IDF in recent years. Poisonous animal species pose a significant threat to the soldiers of the IDF. Overall, envenomation is a common and widespread problem that has significant impact on the military medical system, especially during the spring and summer months. It is possible through institution of proper preventive measures to decrease the exposure of IDF personnel to this environmental hazard.
    Public health reviews 02/1998; 26(3):237-45.
  • [Show abstract] [Hide abstract]
    ABSTRACT: A 28-year-old previously healthy man was diagnosed as having an extensive necrotic lesion of his calf due to loxoscelism. One year later he was diagnosed as having co-inheritance of mutations in factor V and methyl tetrahydrofolate reductase (MTHFR). This is the first report of a possible etiologic connection between loxoscelism necrotic lesions and thrombogenic diseases.
    Public health reviews 02/1998; 26(3):265-70.
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Eight species of venomous snakes capable of inflicting bites dangerous or fatal to humans inhabit the State of Israel. Soldiers in the Israel Defense Forces (IDF) routinely serve under field conditions, and are at greater risk for contact with venomous snakes than are their civilian counterparts. Every year scores of military personnel are bitten by poisonous snakes. The IDF has developed a protocol for field-level treatment of snakebite victims, which we present in this article. Employment of a number of simple therapeutic measures for early treatment of snakebite can prevent or significantly reduce venom-induced morbidity and mortality.
    Public health reviews 02/1998; 26(3):247-56.