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Objective@#To analyze the association between tea drinking during pregnancy and the risk of preterm delivery and abortion,so as to provide basis for prevention of preterm delivery and abortion.@*Methods@#The databases of CNKI,Wanfang,VIP,CBMdisc,PubMed and Web of Science were searched for cohort studies and case-control studies into the association between tea consumption during pregnancy and preterm delivery or abortion until June 30 th,2019. Relative risk（RR）or odds ratio（OR）were used as indicators for the meta-analysis.@*Results@#A total of 1 099 articles were retrieved,14 of them were included in the quantitative study,including 9 cohort studies with 18 295 exposed and 71 890 unexposed individuals and 5 case-control studies with 1 351 cases and 3 059 controls. There was no statistically significant association between tea drinking during pregnancy and preterm birth or abortion（OR/RR=1.08,95%CI：0.99-1.18）. The linear regression model of random effect showed that with the increase of tea consumption during pregnancy,the risk of premature delivery and abortion did not change significantly（OR/RR=1.05，95%CI：0.99-1.11）. There was no publication bias found in Begg's test and Egger's test. @*Conclusion@#Drinking tea during pregnancy is not associated with preterm delivery and abortion.
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Objective To prospectively explore the association between tea drinking and incidence of stroke of adults of Zhejiang province.Methods After excluding participants with heart disease,stroke,cancer and diabetes at baseline study,53 916 participants aged 30-79 years in the China Kadoorie Biobank (CKB) study from Tongxiang were included for final analysis.Cox regression model was used to estimate the hazard ratio (HR) for the association of tea drinking with incident stroke.Results The main type of drinking tea was black tea (79.78％),followed by green tea (20.08％).Of the 53 916 participants,the proportion of participants who drank tea at least once per week was 31.27％.The corresponding proportions for men and women were 60.24％ and 10.30％,respectively.Among 391 512 person-years of the follow-up program (median 7.26 years),a total of 1 487 men and 1 769 women were diagnosed with stroke.After adjusting for socio-demographic status,lifestyle,BMI,waist circumference,and systolic blood pressure,HR for incident stroke decreased with the increase of daily average tea consumption amount (P=0.000 6).Compared with participants who did not drink tea weekly,the HRs for incident stroke in those consuming tea 0.1-,3.0-and ≥5.0 g/d were 0.93 (95％ CI:0.85-1.00),0.88 (95％ CI:0.77-0.99) and 0.79 (95％ CI:0.69-0.89),respectively.The HRs for incident stroke in smokers and non-smokers who consumed tea ≥5.0 g/d were 0.71 (95％CI:0.59-0.86) and 0.97 (95％CI:0.77-1.21),respectively,compared with current smokers and non-smokers who did not drink tea weekly (P=0.040 0).The corresponding HRs for alcohol drinkers and non-drinkers were 0.96 (95％CI:0.76-1.22) and 0.70 (95％CI:0.58-0.84),respectively (P=0.040 0).The corresponding HRs for central obese persons and non-central obese persons were 0.60 (95％ C1:0.44-0.81) and 0.86 (95％ CI:0.73-1.01),respectively (P=0.040 0).Conclusion Tea drinking had an effect on reducing the possibility of incident stroke,especially among those who were current smokers,non-alcohol drinkers and central obese.
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Objective To prospectively explore the association between tea drinking and incidence of stroke of adults of Zhejiang province.Methods After excluding participants with heart disease,stroke,cancer and diabetes at baseline study,53 916 participants aged 30-79 years in the China Kadoorie Biobank (CKB) study from Tongxiang were included for final analysis.Cox regression model was used to estimate the hazard ratio (HR) for the association of tea drinking with incident stroke.Results The main type of drinking tea was black tea (79.78％),followed by green tea (20.08％).Of the 53 916 participants,the proportion of participants who drank tea at least once per week was 31.27％.The corresponding proportions for men and women were 60.24％ and 10.30％,respectively.Among 391 512 person-years of the follow-up program (median 7.26 years),a total of 1 487 men and 1 769 women were diagnosed with stroke.After adjusting for socio-demographic status,lifestyle,BMI,waist circumference,and systolic blood pressure,HR for incident stroke decreased with the increase of daily average tea consumption amount (P=0.000 6).Compared with participants who did not drink tea weekly,the HRs for incident stroke in those consuming tea 0.1-,3.0-and ≥5.0 g/d were 0.93 (95％ CI:0.85-1.00),0.88 (95％ CI:0.77-0.99) and 0.79 (95％ CI:0.69-0.89),respectively.The HRs for incident stroke in smokers and non-smokers who consumed tea ≥5.0 g/d were 0.71 (95％CI:0.59-0.86) and 0.97 (95％CI:0.77-1.21),respectively,compared with current smokers and non-smokers who did not drink tea weekly (P=0.040 0).The corresponding HRs for alcohol drinkers and non-drinkers were 0.96 (95％CI:0.76-1.22) and 0.70 (95％CI:0.58-0.84),respectively (P=0.040 0).The corresponding HRs for central obese persons and non-central obese persons were 0.60 (95％ C1:0.44-0.81) and 0.86 (95％ CI:0.73-1.01),respectively (P=0.040 0).Conclusion Tea drinking had an effect on reducing the possibility of incident stroke,especially among those who were current smokers,non-alcohol drinkers and central obese.
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Objective To explore the relationship between Wuyishan cliff tea and esophageal cancer,and make integrated measures to prevent and control esophageal cancer.Methods A case-control study was conducted with a ratio of 1 to 1 and a health survey was conducted on objects which included 92 cases with histologically confirmed diagnoses of squamous-cell carcinoma of the esophagus and 92 controls matched by age,sex and resident.The analysis method of conditional logistic regression was used to analyze the influence of cliff tea on the development of esophageal cancer. Results The frequency of cliff tea drinking was 73.91% in cases with esophageal cancer compared with 84.78% in controls. As compared with subjects without tea drinking,subjects with cliff tea drinking significantly decreased the risk for developing esophageal cancer (P<0.05),and its OR were 0.60.The risk of esophageal cancer significantly reduced with increasing frequency of cliff tea drinking per week. Furthermore, we also found that the risk of esophageal cancer significantly reduced with the duration of cliff tea drinking and the early of beginning to drink cliff tea.Conclusion Wuyishan cliff tea drinking may protect against the risk of esophageal cancer.
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Objective To explore the correlation between Parkinson's disease(PD) and living habits.Methods 114 PD cases from ongoing PD prevalence survey in Beijing region and the neurological clinic center of Beijing Union Hospital and 205 controls matched on gender, race and residence were recruited in this study. Through in-person questionnaire interview, general data and living habits such as smoking, tea drinking and alcohol drinking were obtained and analyzed by population-based case control study.Results We observed reduced risk for PD in smokers(OR:0.538; 95%CI: 0.290, 0.998) and tea-drinkers(OR:0.199; 95%CI:0.114,0.346). There was no significant correlation between alcohol drinking and PD.Conclusion An inverse correlation exists in PD with smoking or tea drinking except for alcohol drinking.