• 文献检索
  • 文档翻译
  • 深度研究
  • 学术资讯
  • Suppr Zotero 插件Zotero 插件
  • 邀请有礼
  • 套餐&价格
  • 历史记录
应用&插件
Suppr Zotero 插件Zotero 插件浏览器插件Mac 客户端Windows 客户端微信小程序
定价
高级版会员购买积分包购买API积分包
服务
文献检索文档翻译深度研究API 文档MCP 服务
关于我们
关于 Suppr公司介绍联系我们用户协议隐私条款
关注我们

Suppr 超能文献

核心技术专利：CN118964589B侵权必究
粤ICP备2023148730 号-1Suppr @ 2026

文献检索

告别复杂PubMed语法，用中文像聊天一样搜索，搜遍4000万医学文献。AI智能推荐，让科研检索更轻松。

立即免费搜索

文件翻译

保留排版，准确专业，支持PDF/Word/PPT等文件格式，支持 12+语言互译。

免费翻译文档

深度研究

AI帮你快速写综述，25分钟生成高质量综述，智能提取关键信息，辅助科研写作。

立即免费体验

用于不等组大小和不等方差的连续结果的样本量公式。

Sample size formula with a continuous outcome for unequal group sizes and unequal variances.

作者信息

Schouten H J

机构信息

Department of Methodology and Statistics, Maastricht University, The Netherlands.

出版信息

Stat Med. 1999 Jan 15;18(1):87-91. doi: 10.1002/(sici)1097-0258(19990115)18:1<87::aid-sim958>3.0.co;2-k.

DOI:10.1002/(sici)1097-0258(19990115)18:1<87::aid-sim958>3.0.co;2-k
PMID:9990694
Abstract

Guenther derived a simple formula for the accurate computation of equal sample sizes when the two-sample t-test with pooled variance estimate is used. In the present paper, the Guenther formula is generalized to the case of unequal sample sizes. In addition, the case of unequal variances is considered.

摘要

根特推导出了一个简单公式，用于在使用合并方差估计的两样本t检验时准确计算相等的样本量。在本文中，根特公式被推广到不等样本量的情况。此外，还考虑了方差不等的情况。

相似文献

1
Sample size formula with a continuous outcome for unequal group sizes and unequal variances.用于不等组大小和不等方差的连续结果的样本量公式。
Stat Med. 1999 Jan 15;18(1):87-91. doi: 10.1002/(sici)1097-0258(19990115)18:1<87::aid-sim958>3.0.co;2-k.
2
Analysis of covariance with pre-treatment measurements in randomized trials under the cases that covariances and post-treatment variances differ between groups.在各群组间协方差和治疗后方差不同的情况下，对随机试验中的预处理测量值进行协方差分析。
Biom J. 2011 May;53(3):512-24. doi: 10.1002/bimj.201000200.
3
A simple procedure to compute the sample size needed to compare two independent groups when the population variances are unequal.当总体方差不相等时，用于计算比较两个独立组所需样本量的一个简单程序。
Stat Med. 2001 Apr 15;20(7):1089-95. doi: 10.1002/sim.722.
4
On sample size calculation for 2x2 fixed-effect ANOVA when variances are unknown and possibly unequal.关于方差未知且可能不相等时2×2固定效应方差分析的样本量计算。
Br J Math Stat Psychol. 2009 May;62(Pt 2):417-25. doi: 10.1348/000711008X322853. Epub 2008 Jun 16.
5
Analysis of covariance with pre-treatment measurements in randomized trials: comparison of equal and unequal slopes.随机试验中采用治疗前测量值的协方差分析：等斜率与不等斜率的比较
Biom J. 2011 Sep;53(5):810-21. doi: 10.1002/bimj.201100065. Epub 2011 Aug 24.
6
The variable-criteria sequential stopping rule: generality to unequal sample sizes, unequal variances, or to large ANOVAs.变准则序贯停止规则：适用于不等样本量、不等方差或大方差分析的情况。
Behav Res Methods. 2010 Nov;42(4):918-29. doi: 10.3758/BRM.42.4.918.
7
Approximate sample size formulas for the two-sample trimmed mean test with unequal variances.用于不等方差双样本截尾均值检验的近似样本量公式。
Br J Math Stat Psychol. 2007 May;60(Pt 1):137-46. doi: 10.1348/000711006X100491.
8
Estimating sample size for continuous outcomes, comparing more than two parallel groups with unequal sizes.估计连续型结局的样本量，比较两个以上大小不等的平行组。
Stat Med. 1997 Dec 30;16(24):2805-11. doi: 10.1002/(sici)1097-0258(19971230)16:24<2805::aid-sim676>3.0.co;2-b.
9
A simple approximation for calculating sample sizes for comparing independent proportions.一种用于计算比较独立比例时样本量的简单近似方法。
Biometrics. 1980 Jun;36(2):343-6.
10
A note on preliminary tests of equality of variances.关于方差齐性初步检验的说明。
Br J Math Stat Psychol. 2004 May;57(Pt 1):173-81. doi: 10.1348/000711004849222.

引用本文的文献

1
Setting proficiency standards for simulation-based mastery learning of short antegrade femoral nail osteosynthesis: a multicenter study.设定基于模拟的股骨近端逆行钉内固定术掌握程度的熟练标准：一项多中心研究。
Acta Orthop. 2024 May 30;95:275-281. doi: 10.2340/17453674.2024.40812.
2
Optimal allocation of clusters in stepped wedge designs with a decaying correlation structure.具有衰减相关结构的阶乘楔形设计中的最优聚类分配。
PLoS One. 2023 Aug 16;18(8):e0289275. doi: 10.1371/journal.pone.0289275. eCollection 2023.
3
Optimal placebo-treatment comparisons in trials with an incomplete within-subject design and heterogeneous costs and variances.
在具有不完全个体内设计和异质成本和方差的试验中，最优安慰剂治疗比较。
PLoS One. 2023 Apr 20;18(4):e0283382. doi: 10.1371/journal.pone.0283382. eCollection 2023.
4
Optimal allocation to treatments in a sequential multiple assignment randomized trial.序贯多项分配随机试验中的最优治疗分配。
Stat Methods Med Res. 2021 Nov;30(11):2471-2484. doi: 10.1177/09622802211037066. Epub 2021 Sep 23.
5
Optimal allocations for two treatment comparisons within the proportional odds cumulative logits model.比例优势累积对数模型中两种处理比较的最优分配。
PLoS One. 2021 Apr 21;16(4):e0250119. doi: 10.1371/journal.pone.0250119. eCollection 2021.
6
Optimal designs for group randomized trials and group administered treatments with outcomes at the subject and group level.针对群组随机试验以及在个体和群组层面都有结局的群组实施治疗的优化设计。
Stat Methods Med Res. 2020 Mar;29(3):797-810. doi: 10.1177/0962280219846149. Epub 2019 May 1.
7
Efficient design of cluster randomized trials with treatment-dependent costs and treatment-dependent unknown variances.具有治疗相关成本和治疗相关未知方差的群组随机试验的有效设计。
Stat Med. 2018 Sep 20;37(21):3027-3046. doi: 10.1002/sim.7824. Epub 2018 Jun 10.
8
Optimal treatment allocation for placebo-treatment comparisons in trials with discrete-time survival endpoints.在具有离散时间生存终点的试验中，用于安慰剂治疗比较的最优治疗分配。
Stat Med. 2015 Nov 30;34(27):3490-502. doi: 10.1002/sim.6569. Epub 2015 Jun 28.