Kanai M, Kanai O, Fujita K, et al. - By analyzing workers of manufacturing industry who had health check-ups in 2017, researchers tried to determine the tests that could predict lung function impairment among workers. In this prospective study, the participants were examined via chronic obstructive pulmonary disease assessment test (CAT), spirometry, and physical fitness evaluations, including handgrip strength (HGS). A reduction in any of forced expiratory volume in 1 s (FEV₁), forced vital capacity (FVC), or a FEV₁/FVC ratio less than the lower limit of normal, defined lung function impairment. In this study, the factors that displayed a significant link with lung function impairment in men were: ever-smoking, passive smoking at home in childhood, high CAT scores, and reduced HGS.