LI Sheng, WANG Jin-yu, LIANG Li-ping, XIN Fu, LI Pu, LI Shou-yu, MA Han-ping, WANG Yu-hong, WANG Hui, LI Shou-kai, JIA Qing, SU Li-min. Comparison of lung functions among children in areas with different levels of sand dust pollution in Gansu Province[J]. Journal of Environmental and Occupational Medicine, 2018, 35(2): 118-123. DOI: 10.13213/j.cnki.jeom.2018.17537
Citation: LI Sheng, WANG Jin-yu, LIANG Li-ping, XIN Fu, LI Pu, LI Shou-yu, MA Han-ping, WANG Yu-hong, WANG Hui, LI Shou-kai, JIA Qing, SU Li-min. Comparison of lung functions among children in areas with different levels of sand dust pollution in Gansu Province[J]. Journal of Environmental and Occupational Medicine, 2018, 35(2): 118-123. DOI: 10.13213/j.cnki.jeom.2018.17537

Comparison of lung functions among children in areas with different levels of sand dust pollution in Gansu Province

  • Objective To compare the lung functions among children in areas with different levels of sand dust pollution.

    Methods Minqin County, Lanzhou City, and Pingliang City of Gansu Province were selected as the source area of sand dust, affected area of sand dust, and control area, respectively. A total of 6 000 grade 3-6 children were recruited by random cluster sampling, and 5 224 children were included from the three areas (Minqin, n=1 702; Lanzhou, n=1 726; Pingliang, n=1 796) to conduct pulmonary function test and questionnaire survey from April to May 2016. Pulmonary function indices included forced vital capacity (FVC), forced expiratory volume in one second (FEV1), and ratio of forced expiratory volume in one second to forced vital capacity (FEV1/FVC). Data were analyzed by one-way ANOVA, chi-square test, and multiple logistic regression with SPSS 18.0 software.

    Results Among the children in Minqin County, Lanzhou City, and Pingliang City, there were no differences in age and height, and their body weights were (38.7±10.3), (39.0±11.1), and (37.3±9.3)kg, respectively, with statistical differences (F=13.874, P < 0.01). The results of FVC, FEV1, and FEV1% were (2.35±0.51)L, (1.92±0.46)L, and (89.43±20.46)% for children in Minqin County, respectively; (2.38±0.53)L, (1.99±0.50)L, and (91.45±20.69)% for children in Lanzhou City, respectively; and (2.39±0.49)L, (2.05±0.46)L, and (93.53±18.71)% for children in Pingliang City, respectively. The FEV1 of children in Minqin was lower than that in Pingliang and Lanzhou (P < 0.017). The FEV1 and FEV1/FVC of children in Lanzhou were both lower than those in Pingliang (Ps < 0.017). The results of multiple logistic regression analysis displayed that compared with Pingliang, the OR values (95% CI) of obstruction lung function impairment and restrictive lung function impairment were 6.079 (4.830-7.652) and 1.783 (1.429-2.224) for children in Minqin, respectively, and the OR value (95% CI) of obstruction lung function impairment was 2.641 (2.067-3.375) for children in Lanzhou (Ps < 0.01). Compared with Lanzhou, the OR values (95% CI) of obstruction lung function impairment and restrictive lung function impairment were 2.304(1.931-2.747) and 1.572(1.272-1.942) for children in Minqin, respectively (Ps < 0.01).

    Conclusion There is an increased risk of lung function impairment for children in sand dust exposure areas, mainly obstructive lu ng function impairment and especially in sand dust source areas.

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