BACKGROUND: The reference values of the Work Ability Index (WAI) are best known for people aged over 45 years. However, the WAI score is highly dependent on age and population-based reference values for young employees are needed. AIM: To present WAI scores calculated for a population-based sample of employees in their early 30s. METHODS: A self-administered questionnaire including the items of the WAI was used. The study included 3725 employees (2021 men and 1704 women) aged 31 from part of the Northern Finland Birth Cohort 1966 Study (NFBC-66) and who were working in a wide range of occupations in northern Finland or in the Helsinki region during 1997-1998. RESULTS: The WAI scores among young employees varied from 15 to 49 with a mean of 40.7 points (SD 4.2). The 15th percentile, median and 85th percentile of the WAI scores were 37, 41 and 45 points, respectively. The WAI scores were relatively high for both men and women. CONCLUSIONS: When classification of WAI scores into four work ability categories is used, the scores of employees in their early 30s should be evaluated separately from those of older age groups. For young employees work ability categories poor (7-36 points), moderate (37-40 points), good (41-44 points) and excellent (45-49 points) are suggested.
To determine reference values for vertebral heights in healthy young Danish males using morphometric X-ray absorptiometry (MXA).
A population-based study group of 487 males aged between 20 and 30 years (mean 25 years) from the county of Funen, Denmark, were recruited. Using a Hologic QDR 4500 (dual energy X-ray absorptiometry) DXA-scanner, MXA scans covering the vertebrae from T4 to L4 were acquired for each subject. Anterior (Ha), middle (Hm), and posterior (Hp) heights of the thoracic (T4-T12) and lumbar (L1-L4) vertebral bodies were measured. Moreover, wedge, mid-wedge, crush I, and crush II ratios were calculated.
No correlation between vertebral dimensions and crush indices on the one hand and age or weight on the other were found. Body height, however, correlated significantly with the cumulated vertebral heights. Reference data for vertebral dimensions, wedge, mid-wedge, crush I, and crush II are tabulated.
The anterior, middle, and posterior heights of the vertebral bodies of T4 to L4 can be measured reproducible with MXA. In young men, the cumulative vertebral heights correlated with body height but not with age. Moreover, the wedge and crush indices were unrelated of both age and height.
This paper presents a large-scale cross-sectional study of Danish children's early language acquisition based on the Danish adaptation of the MacArthur-Bates Communicative Development Inventories (CDI). Measures of validity and reliability imply that the Danish adaptation of the American CDI has been adjusted linguistically and culturally in appropriate ways which makes it suitable for tapping into Danish children's language acquisition. The study includes 6,112 randomly selected children in the age of 0 ; 8 to 3 ; 0, and results related to the development of early gestures, comprehension and production of words as well as grammatical skills, are presented.
A Norwegian version of the Penn State Worry Questionnaire (PSWQ) was administered to 304 undergraduate students together with the Beck Depression Inventory (BDI), the State-Trait Anxiety Inventory (STAI) and the Maudsley Obsessive Compulsive Inventory (MOCI). The PSWQ was also administered to a community sample comprising 879 subjects, together with the Beck Anxiety Inventory (BAI), the Beck Depression Inventory II (BDI II) and the White Bear Suppression Inventory (WBSI). Structural equation modeling showed that a three-factor solution of the PSWQ gave the best goodness of fit. The Norwegian version of the PSWQ demonstrated adequate psychometric properties in terms of reliability and validity in both samples. Females scored higher than males on PSWQ.
Several studies show that asthma mortality in children and adolescents increased until the mid-1990s, after which it has slightly decreased worldwide. The objective of this study was to describe the mortality rates of childhood asthma in Finland, and to analyze patient characteristics to identify predisposing factors for fatal asthma exacerbation among children and adolescents during 1976-1998 (2004). All death certificates where asthma or related respiratory tract disease was coded as the underlying cause of death were reviewed for those under 20 years of age. Health care records and autopsy reports were evaluated to validate the cause of death and to identify any predisposing factors. In all, there had been 28 asthma deaths. The validity of the death certificates proved to be good as only 7% were misclassified. Death occurred either in the very young children or adolescents: the median age in the group of 12 years (n = 13) was 18.1 years. The fatal exacerbations occurred mostly during summer and early autumn. Clinical triggers, recorded for 14/22 patients with available patient records, included respiratory infection, (12) use of ibuprofen despite known allergy (1), and exercise after visiting a horse stable (1). The severity of the disease was discernible in 21 patients: severe in 15, moderate in 5, and mild in 1 patient. Inhaled corticosteroids were not used as maintenance or periodic therapy in 12/22 patients, of whom 4 had died during the 1990s. In conclusion, asthma mortality in Finnish children and adolescents was rare and its incidence remained stable. The validity of the death certificate diagnoses proved to be good. Poor asthma management and non or undertreatment with inhaled corticosteroids were risk factors for fatal asthma.
In recent years several Danish studies of the etiology, time trends and long-term health consequences of cryptorchidism have relied on diagnoses and surgical treatments registered in the National Patient Registry. We evaluated the diagnostic accuracy of these registry data.
According to the Danish National Patient Registry, 16,168 males were diagnosed with cryptorchidism and 9,244 surgical treatments for cryptorchidism were performed between January 1, 1995 and October 10, 2009. We randomly selected 500 diagnosed cases, of which 284 had been managed surgically. We requested the medical records from the departments making the diagnoses and performing the surgery.
We successfully retrieved medical records for 452 diagnosed cases (90%) and 249 operations (88%). Overall positive predictive value of a registry diagnosis of cryptorchidism was 80% (95% CI 77-84) using the testicular position described by the physician performing the clinical examination as the gold standard. Similarly the positive predictive value of the surgical treatment registration was 99% (95% CI 98-100) using the type of procedure performed.
The data on cryptorchidism in the Danish National Patient Registry are quite accurate. In etiological research the limited misclassification will in most cases only slightly attenuate estimates of the true relative association. Thus, the registry has the potential to serve as a valuable research tool, although caution should be exercised when studying time trends or geographical differences.
Many internationally adopted children have a pre-adoption video for prospective adoptive parents to review before their commitment to adopt. No published report to date has examined the value of the pre-adoption video evaluation (PreAVE) as a predictor of post-adoption developmental status. The present study was designed to determine whether PreAVE can predict the post-adoption developmental status of internationally adopted children. In this retrospective chart review, children who presented to the Yale International Adoption Clinic between December 1998 and September 2000, and had both a PreAVE and a post-adoption developmental evaluation (PosADE) were selected (N = 20) PreAVE was done using the Denver II and PosADE was done using the Bayley Scales of Infant Development, 2nd edition. The Pearson r coefficient between the two ratings was determined and sensitivity and specificity were calculated. There was a significant correlation between the PreAVE and the PosADEs (r = 0.53, p = 0.01).The sensitivity of PreAVE to detect moderate to severe developmental delay was 43% and the specificity was 85%. Although ratings of development on PreAVE are similar to PosADE, the ability to detect moderate to severe developmental delay by video review is limited.