Addendum to Daily changes in Ventilatory Capacity in Smokers and Non-smokers.

Carey, G. C. R.; Dawson, T. A. J.; Merrett, J. D.

doi:10.1136/jech.22.1.59

Cited by 3 publications

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“…The subjects had been fasting on both occasions. Carey et al (1967Carey et al ( , 1968 found a decline of F.E.V.1 during the day of 0 043 1. in non-smokers and 0-071 1. in smokers ; but even if those high daily declines of F.E.V.1 were calculated in this series the yearly decline is significantly greater than predicted according to the above-mentioned equations.…”

Section: Discussionmentioning

confidence: 99%

Decrease in Ventilatory Capacity between Ages of 50 and 54 in Representative Sample of Swedish Men

Wilhelmsen¹,

Orha²,

Tibblin³

1969

BMJ

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Summary: The ventilatory capacity, including flowvolume curves of 313 men, all 50 years old, was examined in 1963 and 1967. The group as a whole, which included persons with chronic bronchitis, with ".other respiratory symptoms," and without respiratory symptoms, showed the same absolute decrease in ventilatory capacity.Vital capacity, forced expiratory volume, and maximum expiratory flow all dropped more for the smokers than for either the non-smokers or the ex-smokers. In those who had stopped smoking for four years or less, however, ventilatory capacity did not decline significantly less than in those who continued to smoke. Tables V and VI for references). Factors such as the nature of the ambient air and smoking habits also affect the ventilatory capacity. A better way of studying the influence of different factors is to follow pulmonary function from year to year in the same people (Higgins and Oldham, 1962 ;Fletcher, 1968 ;Higgins et al., 1968). IntroductionThe present investigation had three aims: (1) to record the changes in the ventilatory capacity during a four-year period in a randomly selected sample of men born in the same year; (2) to determine whether there was any difference in the ventilatory capacity between groups which differed as regards respiratory symptoms and smoking habits; and (3) to analyse the drop with age in comparison with a prediction from regression equations.The results of a cross-sectional study in 1963, using the same sample of men, on the connexion between smoking and ventilatory capacity have been published, as have the results from a control group without any respiratory symptoms (Wilhelmsen and Tibblin, 1966;Wilhelmsen, 1968).

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Section: Discussionmentioning

confidence: 99%

Decrease in Ventilatory Capacity between Ages of 50 and 54 in Representative Sample of Swedish Men

Wilhelmsen¹,

Orha²,

Tibblin³

1969

BMJ

View full text Add to dashboard Cite

show abstract

“…[7] The existence of circadian rhythm in lung function meant that it was necessary that such recordings were made at the same time of the day for accuracy of comparison. [89]…”

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confidence: 99%