Selected article for: "CI 95 confidence interval and confidence interval"
Author: Wu, Xiaobing; Guan, Yang; Ye, Jianbin; Fu, Hanlin; Zhang, Chunlai; Lan, Lina; Wu, Fengxin; Tang, Fen; Wang, Feng; Cai, Yumao; Yu, Weiye; Feng, Tiejian
Title: Association between syphilis seroprevalence and age among blood donors in Southern China: an observational study from 2014 to 2017
  • Document date: 2019_11_2
    • ID: ubnv0fdw_109
    Snippet: Data of donors' number among different subgroups (age, gender and year of donation) and syphilis testing results were sourced from the Shenzhen Blood Center and the SZCCC, respectively. Primary outcomes of interest were the prevalence of syphilis seropositivity and active infection among all blood donors in different age groups. There were four age groups, <25 years, 25-34 years, 35-44 years, and ≥45 years, fully considering the age coverage of.....
    Document: Data of donors' number among different subgroups (age, gender and year of donation) and syphilis testing results were sourced from the Shenzhen Blood Center and the SZCCC, respectively. Primary outcomes of interest were the prevalence of syphilis seropositivity and active infection among all blood donors in different age groups. There were four age groups, <25 years, 25-34 years, 35-44 years, and ≥45 years, fully considering the age coverage of blood donors and age classification in previous studies. 15, 16 We calculated the crude prevalence and its 95% confidence interval (CI). The chi-squared (χ 2 ) test for trend was used to assess the difference in prevalence among age groups. Odds ratios (ORs) and their 95% CIs were calculated when comparing the risk of syphilis seropositivity and active infection between the ≥ 45 years age group and other age groups. Line graphs were used to describe the changes in prevalence for both syphilis seropositivity and active infection among the age groups after stratification by gender and year of donation. Furthermore, we described the distribution of TRUST titres among the age groups and compared the difference using the χ 2 test for trend. Data were analysed using SPSS 17.0 for Windows (IBM Corp., Armonk, USA); p < 0.05 was considered statistically significant in the χ 2 test. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 F o r p e e r r e v i e w o n l y

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