No abstract

BackgroundEpisodes of low back pain (LBP) are very common among workers. A number of occupational risk factors have been shown to increase the risk for LBP. One of these risk factors is exposure to whole body vibration, which is a known characteristic in driving professions. The aim of this study was to assess the impact of driving on LBP amongst young professional drivers.MethodsThis is an historical-prospective cohort study based on the Israel Defense Forces (IDF) database of male soldiers drafted between the years 1997–2006. Subjects’ medical history with specific reference to LBP medical history, clinical and radiographic findings were taken as part of the recruitment process to the IDF. The study group included subjects (n = 80,599) from three occupational groups: administrative units (AU), car drivers (CD) and truck drivers (TD) that were followed for 3 years. The incidence and recrudescence rates of LBP were calculated based on standardized LBP severity tiers.ResultsThe total incidence rate for LBP was 0.65%, 0.7% and 0.34% for AU, CD and TD respectively. In a comparison between subjects without a history of LBP (category 1) to subjects with a history of LBP without clinical findings (category 2) and subjects with a history of LBP with mild clinical / radiographic findings (category 3), the relative risk (RR) for severe LBP exacerbation was 1.4 (p < 0.001) and 3.8 (p < 0.01), respectively. The LBP exacerbation rates within different severity tiers yielded a similar trend amongst all profession groups.ConclusionsThis study included 80,000 soldiers who represent a population of driving and administrative occupations aged 18–21. The significant risk factors for developing LBP were a previous history of LBP and presence of LBP symptoms at the start of work. A correlation was identified between severity of LBP at the initial examination and further exacerbation of LBP in all examined occupations. Driving as a profession in our (young) age-group was not identified as a risk factor for LBP.

To investigate whether ultrasound follow-up for the detection of postpartum retained products of conception (RPOC) in women considered at risk for this condition may allow for early diagnosis. Parturients at risk for RPOC underwent an ultrasound exam on the second postpartum day. Based on the ultrasound findings, women were either: (1) discharged to routine postpartum care in cases of normal scans, (2) invited for follow-up in cases of abnormal scans. We retrospectively analyzed the rates of women requiring uterine evacuation due to persistent abnormal scans. 761 parturients (out of 17 010 deliveries, 4.5 %) were included. Of those, 490 (64.4 %) women had a normal initial scan, but two of them were later readmitted for uterine evacuation. The remaining 271 (35.6 %) women were found to have an abnormal scan: (a) thickened endometrium > 10 mm with hypo- and hyper-echoes and negative Doppler flow considered low suspicion for RPOC was described in 260 cases, of whom 23 (8.8 %) underwent uterine evacuation with placental remnants confirmed in 12/23 (52.2 %), and (b) an echogenic mass with positive Doppler flow considered high suspicion for RPOC was described in 11 cases, all of whom underwent uterine evacuation, with placental remnants confirmed in 9/11 (81.8 %). The number of scans required to detect RPOC in one patient was 33. Postpartum ultrasound evaluation may allow for early diagnosis of RPOC in women considered at risk for this condition.