方法采用分组对照研究的方法，检查组与对照组对结核菌素纯蛋白衍化物（PPD）试验的反应情况。
METHODS In a cross-sectional survey, we studied purified protein derivative(PPD) test in exposure group and control group.
这项英国研究把107位病人随机选择分组，对照组的治疗只有卧床休息，治疗组在卧床休息之外还每天注射链霉素。
The British study randomly assigned 107 patients either to a control group that received only bed rest or to a treatment group that received daily injections of streptomycin in addition to bed rest.
设计：以细胞为研究对象，分组对照重复观察测量。
DESIGN: a grouping controlled and repeated trial was conducted with the cells as the subjects.
方法对146例进展期胃癌病人分组行腹腔热低渗液灌注及动脉插管化疗，并对其腹腔转移率、肝转移率及3年生存率对照研究。
Methods 146 patients were divided into treated and control group. The peritoneal and hepatic recurrence and 3 year survival rate of each group were analyzed.
研究目的：用随机对照方法分组观察综合疗法（推拿、针灸及中药外敷）对肱骨外上髁炎的临床疗效并探讨其作用机理。
Objective:By using random control grouping method to investigate the effectiveness of TCM combination method on Lateral Epicondylitis (LE) and understand its dynamics.
材料和方法：这是一项随机、对照、双盲、平行分组、多中心的研究。
MATERIALS and METHODS: This was a randomized, double-blind, placebo controlled, parallel group, multicenter study.
设计：采用随机分组、安慰剂对照实验研究。
研究设计和方法对于患有慢性足部溃疡的糖尿病患者，超高压氧气疗法（HODFU）研究采用了随机分组、单中心、双盲、安慰剂对照的临床试验。
RESEARCH DESIGN AND METHODS The Hyperbaric Oxygen Therapy in Diabetics with Chronic Foot Ulcers (HODFU) study was a randomized, single-center, double-blinded, placebo-controlled clinical trial.
研究设计和方法对于患有慢性足部溃疡的糖尿病患者，超高压氧气疗法（HODFU）研究采用了随机分组、单中心、双盲、安慰剂对照的临床试验。
RESEARCH DESIGN AND METHODS The Hyperbaric Oxygen Therapy in Diabetics with Chronic Foot Ulcers (HODFU) study was a randomized, single-center, double-blinded, placebo-controlled clinical trial.
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