Women in Wandsworth are less likely to attend a screening for breast cancer in south west London.
Figures show only 66 per cent of women aged 53 to 70 attended a screening last year, lower than the national target of 70 per cent.
However, the uptake has increased over the past six years with only 64 per cent of women attending in 2010.
The data was revealed in a report by Wandsworth's director of public health, based on data from NHS England.
It shows Wandsworth has the lowest uptake for a screening in south west London, but is above average for an inner-London borough.
The South West London Breast Screening Service (SWLBSS) is based in St George's, Tooting, and serves women living in Croydon, Kingston, Richmond, Sutton, Merton and Wandsworth.
Factors cited as affecting the uptake include the transient population in Wandsworth and the ethnic make up.
Black Caribbean women are under represented by 20 per cent, Pakistani by 50 per cent and Chinese are under represented by 20 per cent.
The numbers of people moving in and out of the borough affect the figures, with many women not attending appointments because they no longer live in Wandsworth.
Uptake rates are also lower in practises serving more deprived areas of the borough,
SWLBSS is targeting the problem by sending text reminders to women and second invitation letters.
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