Determining the date of diagnosis – is it a simple matter? The impact of different approaches to dating diagnosis on estimates of delayed care for ovarian cancer in UK primary care

Table 1 READ codes for definite and very closely related diagnosis of ovarian cancer.

READ code	Name
	Definite diagnosis
B440.00	Malignant neoplasm of ovary
B440.11	Cancer of ovary
B44..00	Malignant neoplasm of ovary and other uterine adnexa
	Very closely related diagnosis
BB81.00	[M]Ovarian cystic, mucinous and serous neoplasms
BB81.11	[M]Ovarian cystadenoma or carcinoma
BB81.12	[M]Ovarian mucinous tumour
BB81.13	[M]Ovarian papillary tumour
BB81.14	[M]Ovarian serous tumour
BBC0.12	[M]Ovarian stromal tumour
B4...00	Malignant neoplasm of genitourinary organ
B4...11	Carcinoma of genitourinary organ
B553.00	Malignant neoplasm of pelvis
B553z00	Malignant neoplasm of pelvis NOS
B912.00	Neoplasm of uncertain behaviour of ovary
B913z00	Neoplasm of uncertain behaviour of female genital organs NOS
BB81200	[M]Serous cystadenocarcinoma, NOS
BB81800	[M]Papillary serous cystadenocarcinoma
BB81B00	[M]Serous surface papillary carcinoma
BB81E00	[M]Mucinous cystadenocarcinoma NOS
BB81H00	[M]Papillary mucinous cystadenocarcinoma
BB82.00	[M]Mucinous adenoma and adenocarcinoma
BB82100	[M]Mucinous adenocarcinoma
D212000	Anaemia in ovarian carcinoma

The definite diagnosis codes were used to select the cases for the study. The closely related diagnosis codes were use to exclude cases, who had a diagnosis prior to the study period.

ISSN: 1471-2288