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High fruit intake delays lung function decline in past smokers

31 Dec 2017
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High intake of fruits and tomatoes may delay the decline in lung function in adults, particularly in ex-smokers, a recent study has found.

Food frequency questionnaires (FFQs) were used to assess the dietary intake of 680 adults (mean age at baseline 43.8±6.6 years), among whom 16 percent were current smokers while 40 percent had smoked in the past.

Forced vital capacity (FVC) decreased by a mean of 389 mL over the 10-year study period. High consumption of all fruits significantly slowed the yearly decline by 3.48 mL (95 percent CI, 0.04–6.92; p=0.048). High consumption of apples (3.96 mL/year; 0.76–7.15; p=0.01), bananas (3.97 mL/year; 0.51–7.43; p=0.03), and tomatoes (4.74 mL/year; 1.35–8.13; p=0.006) also significantly decelerated the decline in FVC.

In comparison, forced expiratory volume in 1 second (FEV1) declined by 445 mL over the 10-year study period. Only consumption of total fruit significantly slowed down the yearly decline in FEV1 (2.99 mL/year; 0.37–5.61; p=0.025).

The researchers then investigated the role of smoking and found that dietary intake was significantly related to FVC and FEV1 only in ex-smokers. Total fruit intake, for example, significantly decelerated FEV1 (6.41 mL/year; 2.29–10.5; p=0.002) and FVC (8.13 mL/year; 2.22–14.01; p=0.007) decline only in ex-smokers.

Total intake of apples (FEV1: 4.79 mL/year; 0.87–8.72; p=0.017; FVC: 6.75 mL/year; 1.14–12.34; p=0.018) and tomatoes (FEV1: 5.51 mL/year; 0.87–9.44; p=0.019; FVC: 9.09 mL/year; 3.04–15.14; p=0.003) also slowed down the yearly decline in lung function exclusively in ex-smokers. This trend was absent in current and never-smokers.

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Most Read Articles
18 Apr 2018
Higher intake levels of coffee appear to be associated with reduced risk of developing chronic kidney disease, according to data from the Atherosclerosis Risk in Communities Study.
Jairia Dela Cruz, 6 days ago
Infants delivered via caesarean section may be at increased risk of developing acute lymphoblastic leukaemia, according to a US study. Altered microbiota colonization is a possible explanation for this risk, although clear biological mechanisms have yet to be established.
6 days ago
Treatment with danegaptide does not improve myocardial salvage in patients with ST-segment elevation myocardial infarction (STEMI) undergoing primary percutaneous coronary intervention, according to the results of a phase II study.
Pearl Toh, 3 days ago
Tai Chi may be equivalent to pulmonary rehabilitation (PR) in improving health status of patients with chronic obstructive pulmonary disease (COPD), a recent study shows.