Objective: The purpose of the present study was to use a meta-analytic approach to examine the convergent validity of the International Physical Activity Questionnaire (IPAQ). Design: Systematic review by meta-analysis. Setting: The relevant studies were surveyed from five electronic databases. Primary outcomes of interest were the product-moment correlation coefficients between IPAQ and other instruments. Five separate meta-analyses were performed for each physical activity (PA) category of IPAQ: walking, moderate PA (MPA), total moderate PA (TMPA), vigorous PA (VPA) and total PA (TPA). The corrected mean effect size (ESr) unaffected by statistical artefacts (i.e. sampling error and reliability) was calculated for each PA category. Selected moderator variables were length of IPAQ (i.e. short and long form), reference period (i.e. last 7 d and usual week), mode of administration (i.e. interviewer and self-reported), language (i.e. English and translated) and instruments (i.e. accelerometer, pedometer and subjective measure). Subjects: A total of 152 ESr across five PA categories were retrieved from twentyone studies. Results:The results showed small-to medium-sized ESr (0?27-0?49). The highest value was observed in VPA while the lowest value was found in MPA. The ESr were differentiated by some of the moderator variables across PA categories. Conclusions: The study shows the overall convergent validity of IPAQ within each PA category. Some differences in degree of convergent validity across PA categories and moderator variables imply that different research conditions should be taken into account prior to deciding on use of the appropriate type of IPAQ. Keywords IPAQ Convergent validityMeta-analysis Physical activity Physical activity (PA) has been regarded as one of the most important habitual behaviours which leads to a healthy life by preventing diseases and increasing health benefits (1)(2)(3)(4)(5) . As the importance of PA has been emphasized, attempts have been made to develop appropriate measurement tools, including objective and subjective measurement tools, to quantify the amount of PA in daily life. Of these, questionnaires remain the most widely used measurement tool in large-scale studies due to their efficiency of measuring PA levels in large populations (6) .The International Physical Activity Questionnaire (IPAQ) is an instrument which was developed by the International Consensus Group in 1998-1999 to establish a standardized and culturally adaptable measurement tool across various populations in the world (7) . IPAQ is designed to assess the levels of habitual PA for individuals ranging from young to middle-aged adults (i.e. 15-69 years old). In addition, there are different forms of IPAQ depending on several variations which include length of questionnaire (i.e. short or long form), reference period (i.e. last 7 d or usual week) and mode of administration (i.e. self-report or interviewer-based).Soon after IPAQ was developed it was translated into several different languages and numerous...

The goal of this study was to develop a Korean version of the Global Physical Activity Questionnaire (K-GPAQ) and to examine its reliability and validity. The English version of the GPAQ was translated to the Korean language (K-GPAQ) via forward–backward translation. Reliability of the K-GPAQ was evaluated using a one-week interval test–retest method with 115 individuals. Criterion-related validity of the K-GPAQ was examined with 199 participants using accelerometers. Cohen’s kappa and Spearman’s correlation coefficients were used to measure test–retest reliability and validity, respectively. A Bland–Altman analysis was used to assess agreement between physical activity (PA) levels measured via K-GPAQ and the accelerometer. Coefficients for the reliability of the K-GPAQ showed moderate agreement for recreational PA and slight agreement for work-related PA (Cohen’s kappa: 0.60–0.67 for recreational PA and 0.30–0.38 for work-related PA and Spearman’s rho: 0.27–0.47 for work-related PA and 0.53–0.70 for recreational PA). Criterion validity of the total amount of PA, as measured by the K-GPAQ and the accelerometer, showed a weak but significant correlation ( r = 0.34, p < 0.01). The K-GPAQ is a reliable and valid questionnaire to measure PA although K-GPAQ overestimated PA levels.

The purpose of this study was to investigate rater effects on the TGMD-2 when it applied to children with intellectual disability. A total of 22 children with intellectual disabilities participated in this study. Children’s performances in each of 12 subtests of the TGMD-2 were recorded via video and scored by three adapted physical activity specialists who have expertise in the TGMD-2. Two advanced measurement theories, Generalizability-theory (G-theory) and many-facet Rasch model (MFRM), were applied in data analyses. There were relatively large variances attributed to rater effects on the scores of the TGMD-2 awarded to children with intellectual disabilities. The severity of each rater significantly differed across all subtests of the TGMD-2. There was a set of biased ratings interacted with measurement conditions of the TGMD-2.

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The 11-item Illness/Injury Sensitivity Index [ISI; Taylor, 1993: J Behav Ther Exp Psychiatry 24:289-299] measures fears of injury and illness and has the potential to delineate some mechanisms underlying anxiety-associated chronic health conditions. In a principal components analysis in 2005, Carleton et al. [2005a: J Psychopathol Behav Assess 27:235-241] indicated that a two-factor solution (Fear of Injury and Fear of Illness) best explained the structure of the ISI. The primary purpose of this study was to examine the structural and construct validity of the ISI. Results supported a two-factor solution after removal of two overinclusive items. Although the measure demonstrated good factorial validity, convergent and discriminant validity require further evaluation. In addition, a substantial correlation with fear of pain suggests a shift in our perspective on what constitutes a fundamental fear. Future research implications are discussed.

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The authors examined the independent and combined associations of physical activity and obesity with incident type 2 diabetes among 675,496 Korean men from the database of the National Health Insurance Corporation. During an average follow-up of 7.5 years (1996-2005), 52,995 men developed type 2 diabetes. Men with overweight, obese I, and obese II classifications had 1.47, 2.05, and 3.69 times higher risk of type 2 diabetes, respectively, compared with normal weight men, and men with low, medium, and high activity had 5%, 10%, and 9% lower risk of type 2 diabetes, respectively, compared with inactive men after adjustment for confounders and physical activity or body mass index for each other. Overweight and obesity were detrimental within all activity categories, and meeting the activity recommendations (medium and high activity) was beneficial at all body mass index levels. Meeting the activity recommendations appeared to attenuate some negative effects of overweight or obesity, and the increased risk of type 2 diabetes due to inactivity was lower in normal weight men. Both preventing overweight or obesity and increasing physical activity are important to reduce the global epidemic of type 2 diabetes, regardless of body weight and activity levels.

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