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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
Tristan Manalac, 6 days ago
Gestational exposure to grain products fortified with folic acid appears to be linked to a lower risk of psychosis in offspring, according to a recent study.
Pearl Toh, 10 Jul 2018
A dual-hormone artificial pancreas (DAP) with a rapid delivery of insulin and pramlintide in a fixed ratio improves glycaemic control and reduces glucose variability in adults with type 1 diabetes (T1D) compared with first-generation artificial pancreas delivering insulin alone, according to a study presented at ADA 2018.
3 days ago
Chocolate consumption is not associated with risk of coronary heart disease (CHD), stroke or both combined in postmenopausal women free of pre-existing major chronic disease, a study suggests.
Pearl Toh, 4 days ago
More intensive lowering of LDL-C levels was associated with a progressively greater survival benefit than less intensive approach, when the baseline LDL-C levels were ≥100 mg/dL, reveals a meta-analysis of 34 randomized trials.