Dreyer, the Englishman who has done so much work in vital capacity studies, is quoted by Myers1 as follows: "If a person is found to have as much as 10 per cent less vital capacity than is normal for his class, it is probable that he is suffering from some health depressing condition, and if he is as much as 15 per cent below the normal limit, it is practically certain that he is abnormal in this respect." The work of Myers and others narrows the range of diseases expected to those of the lungs, heart and thorax.
It therefore seemed desirable to study carefully the students with low vital capacity in the group of 1,337 students used for the establishment of the new standards given in the first paper of this series (Turner2). All students more than 15 per cent under the average for their height (see chart 1,
TURNER AH. VITAL CAPACITY IN COLLEGE WOMEN: II. A STUDY OF STUDENTS WITH HIGH AND LOW VITAL CAPACITY. Arch Intern Med (Chic). 1930;46(6):938–945. doi:10.1001/archinte.1930.00140180039004
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