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      Associations between anthropometric factors and peripheral neuropathy defined by vibrotactile perception threshold among industrial vibrating tool operators in Japan

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          Abstract

          Objectives:

          The effect of anthropometric factors on the fingertip vibrotactile perception threshold (VPT) of industrial vibrating tool operators (IVTOs) is not well known. The purpose of this study was to investigate the associations between anthropometric factors and fingertip VPT.

          Methods:

          We included for analysis two groups of IVTOs: Group 1, predominantly forestry workers ( n=325); and Group 2, public servants ( n=68). These IVTOs regularly received medical examinations to evaluate hand-arm vibration syndrome. In the examination, measurements of their fingertip VPTs were taken before and after cold-water immersion (10 minutes at 10°C for Group 1 and 5 minutes at 12°C for Group 2). Their body height and weight were measured to calculate the body mass index (BMI). The presence of peripheral neuropathy (PN) was defined as a VPT ≥17.5 dB at 10 minutes after finishing immersion.

          Results:

          In the univariate analysis, weight and BMI were associated with a decreased risk of PN in both Groups 1 and 2. The negative association between BMI and PN remained in the multivariate analysis consistently, but weight reached marginal significance only in the multivariate analysis without BMI in both the groups. Age was positively associated with PN consistently in Group 1 but not in Group 2. Years exposed to vibration showed positive association with PN only in the univariate analysis of Group 1.

          Conclusions:

          Among IVTOs, factors reflecting body heat production, such as weight and BMI, were associated with a decreased risk of VPT-defined PN, regardless of the task engaged.

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          Most cited references17

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          Twenty-year changes in the prevalence of overweight in Japanese adults: the National Nutrition Survey 1976-95.

          S. Inoue, M Kawano, T. Furuhata … (2002)
          The aim of this study was to describe the 20-year changes in body mass index (BMI; kgm(-2)) and the prevalence of overweight in Japanese adults. Cross-sectional annual nationwide surveys (National Nutrition Survey, Japan) were carried out with a large probability sample of the Japanese population. Data sets of the 1976-95 surveys, comprising 91983 men and 120822 women (> or =20 years of age), were used. The analyses were carried out in age and gender groups, and by residential area according to the size of the municipality (metropolitan areas, cities and small towns). The mean BMI increaseed in men with an increment of +0.44 kg m(-2) 10 years(-1) and slightly decreased in women, by -0.09 kg m(-2) 10 years(-1), after adjustment for age. A decreasing trend of mean BMI was most significant in the female 20-29 years age-group (-0.38 kg m(-2) 10 years(-1)), in contrast to an increasing trend observed in elderly women (60-69 and 70+ years age-groups). The prevalence of preobese (BMI: 25-29.9kg m(-2)) and obese (BMI > or = 30 kg m(-2)) men increased from 14.5% and 0.8%, respectively, in the time-period 1976-80 to 20.5% and 2.01% during 1991-95. The increasing trend was most evident in the youngest age-group (20-29 years) and in those from small towns. The overall prevalence of preobese and obese women did not change during the 20-year study period. The prevalence in younger women decreased, this trend being more prominent in metropolitan areas. Although the prevalence of overweight (BMI > or =25 kg m(-2)) in Japanese men and elderly women has increased in the last 20 years, the mean BMI in younger women, especially those in metropolitan areas, has decreased. A population approach to control obesity and prevent obesity-associated diseases should be mainly focused on men and women older than 40 years of age.
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            Are there still healthy obese patients?

            Matthias Blüher (2012)
            Obesity is associated with an increased risk of premature death and represents a fast growing worldwide health problem that is reaching epidemic proportions. Obesity significantly increases the risk of developing metabolic disorders, hypertension, coronary heart disease, stroke, and several types of cancer. However, a subgroup of 'healthy' obese patients seems to be protected against metabolic and cardiovascular obesity comorbidities. This review focuses on potential mechanisms underlying the healthy obese subphenotype. Individuals with obesity typically develop type 2 diabetes, dyslipidemia, fatty liver disease, gout, hypertension, and cardiovascular disease. In the past years it became clear that up to 30% of obese patients are metabolically healthy with insulin sensitivity similar to healthy lean individuals, lower liver fat content, and lower intima media thickness of the carotid artery than the majority of metabolically 'unhealthy' obese patients. Recent studies suggest that protection against development of hepatic steatosis, ectopic fat deposition, inflammation of visceral adipose tissue, and adipose tissue dysfunction contributes to healthy obesity. For the stratification of obesity treatment, definition of metabolically healthy or high-risk phenotypes will facilitate the identification of the obese person who will benefit the most from early lifestyle, bariatric surgery, or pharmacological interventions.
            Article 0 comments Cited 52 times – based on 0 reviews     Review now
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              Validity of self-reported height and weight in a Japanese workplace population.

              K Sugiura, R Otsuka, T Tsunekawa … (2005)
              To assess the validity of self-reported height and weight in a Japanese workplace population, and to examine factors associated with the validity of self-reported weight. Comparison of self-reported height and weight with independent measurement. In total, 4253 men and 1148 women aged 35-64 y (mean measured body mass index (BMI): 23.3 kg/m(2) in men, 21.9 kg/m(2) in women) were included in the study. Self-reported height and weight were obtained by a self-administered questionnaire. Measured height and weight were based on annual health checkups. Sex, age, measured BMI, and the presence of hypertension, diabetes, and hyperlipidemia were examined as potential factors associated with the accuracy of self-reported weight. Self-reported height and weight were highly correlated with measured height and weight for men and women (Pearson's r for men and women: 0.979 and 0.988 in height, 0.961 and 0.959 in weight, 0.943 and 0.950 in BMI, respectively). For men, mean differences+/-2 s.d. of height and weight were 0.078+/-2.324 cm and -0.034+/-5.012 kg, respectively, and for women 0.029+/-1.652 cm and 0.024+/-4.192 kg, respectively. The prevalence of obesity with BMI > or =25 kg/m(2) based on self-reported data (23.6 and 11.5% for men and women, respectively) was slightly smaller than that based on measured data (24.9 and 12.4%, respectively). Specificity and sensitivity, however, were quite high for both men and women (sensitivity was 85.8 and 85.2%, and specificity was 97.0 and 98.9%, respectively). The subjects with higher measured BMI significantly underestimated their weight compared with those with smaller BMI after adjustments for age in men and women. Furthermore, the presence of diabetes in men and age in women affected self-reported weight. Neither the presence of hypertension nor hyperlipidemia was associated with reporting bias. The self-reported height and weight were generally reliable in the middle-aged employed Japanese men and women. However, it should be remembered that self-reported weight was biased by actual BMI and affected by age and the presence of diabetes.
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                Author and article information

                Journal
                Journal ID (nlm-ta): J Occup Health
                Journal ID (iso-abbrev): J Occup Health
                Title: Journal of Occupational Health
                Publisher: Japan Society for Occupational Health
                ISSN (Print): 1341-9145
                ISSN (Electronic): 1348-9585
                Publication date (Electronic): 24 March 2016
                Publication date (Print): 20 March 2016
                Volume: 58
                Issue: 2
                Pages: 145-154
                Affiliations
                [1 ]Department of Hygiene, School of Medicine, Wakayama Medical University
                Author notes
                Correspondence to: S. Takemura, Department of Hygiene, School of Medicine, Wakayama Medical University, 811-1 Kimiidera, Wakayama, 641-8509, Japan ( steakmmi@ 123456wakayama-med.ac.jp )
                Article
                Publisher-manuscript ID: 15-0028-OA
                PMC ID: 5356960
                PubMed ID: 27010084
                SO-VID: 21875952-5242-4b36-b5de-7564c03bed37
                License:

                Journal of Occupational Health is an Open Access article distributed under the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. To view the details of this license, please visit ( https://creativecommons.org/licenses/by-nc-sa/4.0/).

                History
                Date received : 31 January 2015
                Date accepted : 30 September 2015
                Categories
                Subject: Original

                Keywords: anthropometry,cold-water immersion test,hand-arm vibration syndrome,peripheral neuropathy,vibration perception threshold
                Data availability:
                Keywords: anthropometry, cold-water immersion test, hand-arm vibration syndrome, peripheral neuropathy, vibration perception threshold

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