The assumption of fixed-effects model is based on that the true effect of the each trial is same. However, the assumption of random-effects model is based on that the true effect of included trials is normal distributed. The total variance is equal to the sum of within-trial variance and between-trial variance under the random-effects model. There are many estimators of the between-trial variance. The aim of this paper is to give a brief introduction of the estimators of between-trial variance in trial sequential analysis for random-effects model.
Citation: WENG Hong, CAI Lin, WU Kaijie, FANG Cheng, ZENG Guang, ZENG Xiantao. Comparison study of estimators of between-trial variance in trial sequential analysis for random-effects model. Chinese Journal of Evidence-Based Medicine, 2017, 17(3): 369-372. doi: 10.7507/1672-2531.201607063 Copy
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