Knee pain (KP) is commonly reported among workers, especially those in non-managerial occupations such as carpenters, miners and construction workers. However, few studies have been conducted on KP among the teacher population. Therefore, this study aimed to determine the prevalence of KP among school teachers and to explore its association with individual characteristics, lifestyle, work factors, and presence of health conditions. A cross-sectional survey was conducted among teachers at public secondary schools in Selangor, Malaysia. A self-reported questionnaire was utilised to elicit information on socio-demographic characteristics, lifestyle, body mass index, work-related factors, and health-related quality of life (HRQoL). Associations with KP were analysed by logistic regression and reported as odds ratios (ORs) at a 95% confidence interval (CI). The results revealed that the 12-month prevalence of KP was 54.4%. The multivariate analysis showed that age (OR 3.55, 95% CI: 1.92–6.54), kneeling or squatting >1 hour in total (OR 1.48, 95% CI: 1.06–2.08), and physical HRQoL (OR 0.94, 95% CI: 0.92–0.96) were significantly associated with the occurrence of KP. In conclusion, the prevalence of KP among secondary school teachers is high. Age, work-related physical practises, and physical health were found to be significantly associated with KP. Therefore, appropriate strategies should be implemented to address these factors in order to reduce the occurrence of KP, especially among the older teacher population.
Body mass index

OBJECTIVE: To define the MRI findings of congenital high airway obstruction sequence (CHAOS) in a series of fetuses. MATERIALS AND METHODS: Prenatal fetal MR images were reviewed in seven fetuses with CHAOS at 21 to 27 weeks of gestation. The MRI findings were reviewed. The MRI parameters evaluated included the appearance of the lungs and diaphragm, presence or absence of hydrops, amount of amniotic fluid, airway appearance, predicted level of airway obstruction, and any additional findings or suspected genetic syndromes. RESULTS: All the fetuses viewed (7 of 7) demonstrated the following MRI findings: dilated airway below the level of obstruction, increased lung signal, markedly increased lung volumes with flattened or inverted hemidiaphragms, massive ascites, centrally positioned and compressed heart, as well as placentomegaly. Other frequent findings were anasarca (6 of 7) and polyhydramnios (3 of 7). MRI identified the level of obstruction as laryngeal in five cases and tracheal in two cases. In four of the patients, surgery or autopsy confirmed the MRI predicted level of obstruction. Associated abnormalities were found in 4 of 7 (genetic syndromes in 2). Postnatal radiography (n = 3) showed markedly hyperinflated lungs with inverted or flattened hemidiaphragms, strandy perihilar opacities, pneumothoraces and tracheotomy. Two fetuses were terminated and one fetus demised in utero. Four fetuses were delivered via ex utero intrapartum treatment procedure. CONCLUSION: MRI shows a consistent pattern of abnormalities in fetuses with CHAOS, accurately identifies the level of airway obstruction, and helps differentiate from other lung abnormalities such as bilateral congenital pulmonary airway malformation by demonstrating an abnormally dilated airway distal to the obstruction.
Abnormalities, Multiple ; Airway Obstruction/congenital/*pathology ; Ascites/pathology ; Diaphragm/abnormalities ; Female ; Fetal Diseases/*pathology ; Humans ; Lung/pathology ; *Magnetic Resonance Imaging ; Placenta Diseases/pathology ; Pregnancy ; *Prenatal Diagnosis ; Retrospective Studies