Wingrave S J, Beral V, Adelstein A M, Kay C R
J Epidemiol Community Health. 1981 Mar;35(1):51-8. doi: 10.1136/jech.35.1.51.
A comparison has been made between the coding of the cause of death by (a) the Royal College of General Practitioners (RCGP) during the Oral Contraception Study and (b) the Office of Population Censuses and Surveys (OPCS) or the General Register Office for Scotland (GRO) on death certificates for the same subjects. Broad grouping of the International Classification of Diseases (ICD) showed close agreement between RCGP and OPCS or GRO coding for all deaths which occurred from the start of the Oral Contraception Study in 1968 up to December 1978. Moreover, where discrepancies occurred there were no systematic differences between ever-users of oral contraceptive and non-users. Detailed examinations of discrepancies in the coding of the causes of those deaths included in the RCGP publication of October 1977 shows that our previous estimate of mortality risk associated with oral contraceptives would not be materially altered by the use of death certificate information.
(a)在口服避孕药研究期间,皇家全科医师学院(RCGP);(b)人口普查与调查办公室(OPCS)或苏格兰总登记处(GRO),针对同一批受试者的死亡证明。国际疾病分类(ICD)的广泛分组显示,从1968年口服避孕药研究开始至1978年12月发生的所有死亡,RCGP与OPCS或GRO的编码之间有着密切的一致性。此外,在出现差异的地方,口服避孕药的使用者和非使用者之间没有系统性差异。对RCGP 1977年10月出版物中所包含的那些死亡原因编码差异的详细检查表明,使用死亡证明信息不会实质性改变我们之前对与口服避孕药相关的死亡风险的估计。