Herrmann N
Am J Epidemiol. 1985 Jun;121(6):937-47. doi: 10.1093/oxfordjournals.aje.a114064.
The author compared medical, smoking, and dietary consumption data obtained from cases or controls and their respective next-of-kin as part of a study of colon cancer in the five Pennsylvania counties of the Philadelphia metropolitan area. The case population consisted of whites aged 45-69 years who had resided in the region for at least two years prior to diagnosis and diagnosed with colon cancer after July 1, 1976. Controls were selected using an area probability sampling scheme and were frequency-matched to the case group. Questionnaires for cases and controls were administered by interviewers; questionnaires for their next-of-kin were randomly allocated to be self- or interviewer-administered. Agreement when both respondents received the interviewer-administered questionnaire was greater than when the next-of-kin received the self-administered questionnaire for all variables. Medical and cigarette smoking variables exhibited high agreement, the percentage agreement exceeded 80 for 80% of the comparisons, the kappa statistic exceeded 0.6 for 54% of the comparisons. Diet histories were more variable (average agreement ranging from 54% to 82% and average kappa values from 0.17 to 0.59). A subanalysis of subjects and spouses showed that husbands and wives gave equally reliable responses.
作为对费城大都市区宾夕法尼亚州五个县结肠癌研究的一部分，作者比较了从病例或对照及其各自的近亲处获得的医疗、吸烟和饮食消费数据。病例组由年龄在45 - 69岁之间、在诊断前至少在该地区居住两年且于1976年7月1日之后被诊断为结肠癌的白人组成。对照组采用区域概率抽样方案选取，并与病例组进行频率匹配。病例和对照的问卷由访谈员进行发放；其近亲的问卷则随机分配为自行填写或由访谈员填写。对于所有变量，当双方受访者都收到访谈员发放的问卷时的一致性高于近亲收到自行填写问卷时的一致性。医疗和吸烟变量显示出高度一致性，80%的比较中百分比一致性超过80%，54%的比较中kappa统计量超过0.6。饮食史的变异性更大（平均一致性从54%到82%，平均kappa值从0.17到0.59）。对受试者及其配偶的子分析表明，丈夫和妻子给出的回答同样可靠。
