Serum VEGF Level Is Different in Adolescents Smoking Waterpipe versus Cigarettes: The Irbid TRY

Waterpipe (Wp) use is associated with most devastating diseases and particularly popular among adolescents. Vascular endothelium growth factor (VEGF) is essential for generating new vessels. The effect of smoking tobacco on VEGF is controversial and unknown among adolescents. Therefore, the current study compared serum VEGF in adolescents smoking cigarettes (Cg) only (9.3%), Wp only (19.6%), and dual (Wp and Cg) (36.4%) versus nonsmokers (34.6%) in adolescents. A self-reported questionnaire and enzyme-linked immunosorbent assay (ELISA) were used to obtain smoking status and serum VEGF, respectively, in 475 (age: 14.6 ± 1.0 years) boys (n = 263) and girls (n = 212) from Irbid, Jordan. The analysis showed that smoking status (R² = 0.021; p = 0.001) and gender (R² = 0.035; p = 0.000) can predict VEGF. Furthermore, 2-way-ANCOVA revealed that VEGF was lower in the dual cohort versus the Cg (33.4%; p = 0.04) and nonsmoker (29.6%; p = 0.003) cohorts; VEGF in smokers, was lower (33.6%; p = 0.04) in the Wp versus nonsmokers in the boys but not the girls. These results are unique and suggest that smoking lowers VEGF, which might adversely affect vascular growth and function. This is alarming given that adolescents are still in the development stage and smoking, particularly Wp, is popular among them. Therefore, interventions targeting smoking among schoolchildren are urgently needed to avoid the negative effects of smoking, especially on vascular health.

Adolescent Waterpipe Use is Associated with Greater Body Weight: The Irbid-TRY

BACKGROUND

Adult waterpipe smokers are at increased risk of obesity. However, it is unclear if adolescents, who are at the epicenter of the global waterpipe epidemic, are at similar risk.

OBJECTIVE

Therefore, the current study examined the waterpipe smoking relationship with obesity among adolescents.

METHODS

A sample of 2,313 boys and girls in grades 7-10 were surveyed about waterpipe and cigarette use in Jordan. Weight, body mass index (BMI), waist circumference, waist-to-hip ratio, and waist-to-height ratio were measured. Obesity indices were assessed as a function of smoking status (never used tobacco, current waterpipe only, current cigarettes only, and current dual smoking) as well as frequency of use of each tobacco product.

RESULTS

About 51.5% of adolescents smoked waterpipe whereas 29.8% were overweight/obese. Students who smoked waterpipe weekly had twofold greater odds of being obese than never-smokers (OR = 2.14; 95% CI = 1.08-4.21). Approximately 12% of students currently smoked waterpipe but not cigarettes, 2% smoked cigarettes but not waterpipe, and 11% smoked both. Body weight and age- and gender-specific BMI were greater for waterpipe and dual users compared to never users, especially for dual vs. never users (58.6 ±.8 vs. 55.6 ±.4 and.48 ±.07 vs..29 ±.03, respectively; p <.005).

CONCLUSIONS

For dual users, greater frequency of tobacco use was associated with greater weight and BMI. Waterpipe and dual use is associated with greater obesity, BMI, and body weight among Jordanian adolescents. Given the rising epidemics of both tobacco use and obesity among Middle Eastern adolescents, the clustering of these risk factors warrants public health action.