Table 4 Effect of a difference in surgeona or hospital volumea of 10 women on the provision of diagnostic and therapeutic procedures: logistic regression modelsa

From: Effects of specialisation on treatment and outcomes in screen-detected breast cancers in Wales: cohort study

Outcome variable

% received

Explanatory variable

Adjusted odds ratio

95% CI

P -value

Needle biopsyb

66.0

Surgeon volume

1.00

0.96–1.05

0.84

Mastectomyc

47.2

Surgeon volume

0.94

0.90–0.98

0.007

  

Hospital volume

1.05

1.01–1.08

0.011

Axillary surgeryd

93.5

Surgeon volume

1.22

1.10–1.34

<0.001

Radiotherapye

40.3

Surgeon volume

0.91

0.85–0.98

0.015

  

Hospital volume

1.07

1.01–1.14

0.024

Tamoxifenf

56.3

Surgeon volume

1.04

0.98–1.10

0.20

Chemotherapyg

3.8

Hospital volume

0.85

0.76–0.95

0.006

  1. CI=confidence interval.
  2. Surgeon and hospital volume analysed as continuous variables and included in all models.
  3. bAlso adjusted for age, centre and period.
  4. cAlso adjusted for age, centre, period, bilateral tumours, invasive status and the Townsend Deprivation Score.
  5. dAlso adjusted for centre, period, therapeutic procedure and bilateral tumours.
  6. eAlso adjusted for centre, period, therapeutic procedure, tamoxifen, size, grade and nodal status.
  7. fAlso adjusted for centre, period, therapeutic procedure, age, size, grade and nodal status.
  8. gAlso adjusted for age, size, grade and nodal status.
Back to article page