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Indexed/Abstracted in: Chemical Abstracts, CINAHL, Current Contents/Clinical Medicine, EMBASE, PubMed/MEDLINE, Science Citation Index Expanded (SciSearch), Scopus
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Demura S. 1, Yamaji S. 2, Murase T. 3, Nagasawa Y. 4, Sato S. 5, Minami M. 6
1 Faculty of Education, Kanazawa University Kanazawa, Ishikawa, Japan
2 Fukui National College of Technology, Geshi, Sabae Fukui, Japan
3 Research Center of Physical Education, Aichi University Nishikamo, Aichi, Japan
4 Akita Prefectural College of Agriculture, Akita, Japan
5 Life-long Sports Core, Kanazawa Institute of Technology Ishikawa, Japan
6 Kanazawa College of Art, Kanazawa Ishikawa, Japan
Background. The purpose of this study was to establish a convenient prediction equation for residual volume for Japanese male and female young adults after comparisons in reliability and validity with previous equations widely used in studies of body composition with Japanese subjects.
Methods. The subjects were healthy Japanese, 110 males aged 18 to 27 years and 82 females aged 18 to 22 years. Measured residual volume (MRV) was measured with a nitrogen washout technique and each predicted residual volume (PRV) was predicted using a prediction equation. Multiple regression analysis on all possible selections was applied to determine a suitable and convenient prediction equation for residual volume.
Results. Intra-class correlation coefficient and α coefficient of Cronbach in MRV exceeded 0.9, indicating high reliability. Pearson’s correlation coefficients between MRV and each PRV for males and females ranged from 0.225 to 0.327 and - 0.485 to 0.507, respectively. Multiple correlation coefficient adjusted for degrees of freedom applying the one variables of height was 0.592 for males and 0.670 for females.
Conclusions. Considering the practicability of measurement, prediction equations for residual volume with height in Japanese male and female young adults have been proposed. The new prediction equations (PRVnew) are as follows:
male: PRVnew= 32.16 × height (cm) - 4113.70 (Radj= 0.592, SE= 247.13 ml);
female: PRVnew = 34.03 × height (cm) - 4407.78 (Radj= 0.670, SE= 195.74 ml).