BACKGROUND Khat (Catha edulis Forsk) is a psycho-stimulant substance grown in East Africa. But its adverse effects and its prevalence are not well studied. The main aim of the present study is thus to assess the association between khat chewing and GI problems among students in Ambo University. METHODS A cross-sectional study was conducted in January 2010 on 1005 Ambo University students. Stu...

BACKGROUND Despite the fact that betel-quid is one of the most commonly used psychoactive substances worldwide and a major risk-factor for head-and-neck cancer incidence and mortality globally, currently no standardized instrument is available to assess the reasons why individuals chew betel-quid. A measure to assess reasons for chewing betel-quid could help researchers and clinicians develop p...

PREMISE OF STUDY Although there is increasing recognition of the effects of plant intraspecific diversity on consumers, the mechanisms by which such effects cascade-up to higher trophic levels remain elusive. METHODS We evaluated the effects of plant (lima bean, Phaseolus lunatus) intraspecific diversity on a suite of insect herbivores (leaf-chewers, aphids, and seed-eating beetles) and their...

OBJECTIVE To study the relationship between oral lichen planus LP and the habit of chewing deram. METHODS A clinically based controlled observational study including a total of 176 women who used to chew deram and 200 women who never used deram, who consulted the Dermatology Department of Basrah Teaching Hospital, and a private clinic, Barsah, Iraq during the period from February 2005 to July...

BQ chewing may produce significant amounts of reactive oxygen species (ROS), resulting in oral mucosa damage, and ROS may be metabolized by CYP26 families. Because the CYP26 polymorphisms associated with malignant oral disorders are not well known, we conducted an association study on the associations between the single nucleotide polymorphisms (SNP) of CYP26 families and the risks of malignant...

OBJECTIVE To gain an insight on the knowledge, attitude and practices of those who chew betel nut in two different socioeconomic regions of Karachi. METHODS The cross-sectional study was conducted in Saddar and Defence areas of Karachi over a five-week period in March-April 2012. Individual interviews following verbal consent were conducted using a pre-coded questionnaire, which was divided i...

BACKGROUND The current study's aim is to evaluate the possible interaction effects of khat chewing on treatment of paranoid schizophrenic patients. PATIENTS AND METHODS In the study group, 42 male subjects suffered from paranoid schizophrenia and were classified according to their khat chewing habits into two subgroups: either khat-chewer subgroup (SKc; n=21; r=11, h=10) or non-khat-chewer su...

AbstractBackground: Saliva is a biological fluid that has multiple protective functions. These functions can beattained only if the saliva keeps certain physo-chemical properties such as pH.Methods: The main purpose of the current study was to compare the salivary pH among khat chewers and<b...