background: in iran, methadone has been used for methadone maintenance treatment (mmt) as well as analgesic treatment in pain clinics. recently, there are some reports regarding accidental and intentional methadone poisonings and deaths. the aim of this study was to evaluate the trend of methadone poisonings and deaths during a 10-year period in tehran, iran. methods: this was a retrospective c...

background: animal bite is an important and preventable health hazard. this study aimed to determine the epidemiology of animal bites in north khorasan province in iran.   materials and methods: data gathered from health centers from march 2005 until december 2011 were used for this cross-sectional descriptive study of animal bites.   results: a total of 18,517 animal bite cases were reported d...

this is a descriptive survey to define the incidence of co-existing disease in patients undergoing eye surgery before   anesthesia in hospitals of the ministry of health and education in 1993.   in this survey 2000 patients ' records have been studied who were admitted 10 the hospitals. collecting of data   was done by checklist that contained questions about the condition of the heart and...

background: the aim of this study was to assess epidemiology of colorectal cancer (crc) in isfahan, iran. materials and methods: data were gathered from hospital documents of hospital admissions for colonoscopy, surgery, chemotherapy or radiotherapy due to colorectal cancer during 1996-2003. results: 1100 cases with colorectal cancer in seven years were detected and reviewed. our minimum incide...

purpose headache at altitudes has had an incidence of 25-62% through many related studies. many reasons are identified concerning headache at altitudes such as acute mountain sickness (ams), sinus headache, migraine, tension type headache, and frontal tension headache. this study tried to compare different types of headache among trekkers on mount damavand, a 5671m mountain, iran, to find their...

unfortunately, the prevalence of cesarean section has increased in recent years. whereas awareness of the prevalence and causes is inevitable for planning and effective interventions, so aim of this study has designed and conducted for reviewing of systematic prevalence and caesarean causes in iran. in this meta-analysis, the required information have been collected using several keywords which...

methods this cross-sectional study was conducted on 293 nurses working in 24 wards of baqiyatallah hospital in tehran, iran, in 2016. the sampling method was stratified random sampling. data were collected using a self-administered questionnaire, which was classified into 4 subtitles: individual and organizational characteristics, perceived subjective, objective workloads, and some patient safe...

background and aims: thyroid cancer is the most common endocrine malignant and papillary cancer and three times more prevalent in women than men. the aim of this study was to evaluate the incidence rate and trend of thyroid cancer in iranian population. methods: national incidence was rated by iran national cancer registry data derived from iran’s annual national cancer registration reported fr...

Landslide is one of the common hazards occurring globally and Malaysia is not spared as well. Over the past four decades, Malaysia has played host to a number of landslide incidents, resulting in significant loss of lives and damage to property. The magnitude of landslide destruction is quite high in Malaysia. A survey has been carried out on 143 respondents in selected areas. This paper presen...

We prove three theorems giving extremal bounds on the incidence structures determined by subsets of the points and blocks of a balanced incomplete block design (BIBD). These results generalize and strengthen known bounds on the number of incidences between points and m-flats in affine geometries over finite fields. First, we show an upper bound on the number of incidences between sufficiently l...