Table 2

Associations between LOS and patient, treatment and organisational factors

Initial surgery

30 days post-op

LOS Ratio (95% CI)

LOS Ratio (95% CI)




Mastectomy

1.00

1.00

BCS

0.67 (0.66-0.68)

0.66 (0.66-0.67)

1997/98

1.00

1.00

1998/99

0.96 (0.94-0.98)

0.92 (0.91-0.94)

1999/00

0.95 (0.93-0.97)

0.92 (0.90-0.94)

2000/01

0.93 (0.91-0.95)

0.89 (0.88-0.91)

2001/02

0.90 (0.89-0.92)

0.87 (0.85-0.89)

2002/03

0.87 (0.85-0.89)

0.85 (0.84-0.87)

2003/04

0.85 (0.83-0.86)

0.84 (0.82-0.86)

2004/05

0.79 (0.77-0.80)

0.78 (0.76-0.80)

Age (per 10 years)

1.11 (1.11-1.11)

1.08 (1.08-1.08)

Stage I

1.00

1.00

Stage II

1.06 (1.05-1.07)

1.08 (1.07-1.09)

Stage III

1.14 (1.13-1.16)

1.15 (1.13-1.17)

Stage IV

1.18 (1.14-1.23)

1.20 (1.15-1.24)

Missing

1.04 (1.02-1.06)

1.03 (1.01-1.05)

Comorbidities - No

1.00

1.00

Comorbidities - Yes

1.08 (1.07-1.09)

1.08 (1.07-1.10)

Nodes dissected - No

1.00

1.00

Nodes dissected - Yes

1.08 (1.07-1.10)

1.13 (1.11-1.14)

Reconstructive surg - No

1.00

1.00

Reconstructive surg - Yes

1.08 (1.06-1.09)

1.08 (1.06-1.10)

Consultant workload - 10-40

1.00

1.00

Consultant workload - 41-80

0.96 (0.89-1.02)

0.96 (0.89-1.03)

Consultant workload - 81+

0.99 (0.87-1.13)

0.99 (0.90-1.09)

Variance (95% CI)

Variance (95% CI)




Trust level

0.08 (0.04-0.13)

0.06 (0.03-0.10)

Surgical team level

0.05 (0.03-0.06)

0.04 (0.03-0.06)


Downing et al. BMC Health Services Research 2009 9:202   doi:10.1186/1472-6963-9-202

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