Table 1.

 Numbers and rates of women with abnormal cytology^* and abnormal histology^* per 100 women tested since 1976 for those screened in 1991-6

	All women			1956-60 births
	No of women	Rate/1000 tested		No of women	Rate/1000 tested
Abnormal cytology:
Severe dyskaryosis	6 497	30.3		1 250	44.9
Moderate and mild dyskaryosis	12 778	59.5		1 863	66.9
?Glandular neoplasia	401	1.9		39	1.4
Borderline changes	13 876	64.7		1 762	63.3
Total abnormal cytology	33 552	156.4		4 914	176.4
Total with biopsy recorded	17 558	81.8		2 733	98.1
Abnormal histology:
Invasive squamous cancer	259	1.2		38	1.4
Microinvasive squamous cancer	214	1.0		32	1.1
CIN grade III	4 885	22.8		989	35.5
CIN grade II	2 863	13.3		495	17.8
CIN grade I	1 527	7.1		237	8.5
Adenocarcinoma endocervix	37	0.2		9	0.3
Borderline atypia, wart virus, GIN	1 871	8.7		263	9.4
Total abnormal histology	11 656	54.3		2 063	74.1
Total tested	214 582			27 854

CIN=cervical intraepithelial neoplasia; GIN=glandular intraepithelial neoplasia. 

^*Only first and worst occurrence of abnormal cytology and first and worst occurrence of abnormal histology are counted.