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To examine the relationship between postnatal passive smoking and neuropsychological development in rural 2-year-old children.
This study, based on a birth cohort study conducted in rural Yunnan Province in the previous period, followed up with assessments of passive smoking at ages 1 and 2, and a total of 293 mother-child pairs were included in the study. Passive smoking exposure was assessed through self-reports and children's urinary cotinine tests. At age 2, cognitive, language, and motor development were evaluated using the Bayley-III scales. Stata software and multivariate binary logistic regression models were used to analyze the association between between postnatal passive smoking exposure and neuropsychological development in 2-year-old children.
Passive smoking exposure rates of 293 toddlers were 45.73%at age 1 and 65.19% at age 2. Mean cognitive, language, and motor scores at age 2 were 100.73±18.60, 99.50±16.99, and 101.05±19.86, with developmental delay rates of 7.51%, 15.07%, and 14.43%, respectively. The results of the logistic regression analyses showed that passive smoking at age 1 increased the risk of language development delay (OR=2.036, 95%CI: 1.025-4.046).
Passive smoking in infancy is a risk factor for lagging language development in 2-year-old children. It is recommended to create a smoke-free growing environment for infants and toddlers to protect and promote early neuropsychological development.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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