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Table 2 Model results: primary outcomes for standard care, PinPoint testing scenarios and service reconfiguration scenarios

From: An exploratory assessment of the impact of a novel risk assessment test on breast cancer clinic waiting times and workflow: a discrete event simulation model

Strategy

Number completing the model

(95% CI)

Average time to clinic [week days]

(95% CI)

Percentage achieving TWW Target

(95% CI)

Number of Overspill

(95% CI)

Total

BC

No BC

BC

No BC

BC

No BC

Total

Standard care

10,528

(10,511 to 10,545)

503

(499 to 507)

10,025

(10,008 to 10,042)

9.81

(9.81 to 9.82)

9.81

(9.81 to 9.81)

66.4%

(66.0 to 66.9)

66.3%

(66.0 to 66.5)

66.3%

(66.0 to 66.5)

1,685

(1,648 to 1,722)

Pinpoint scenarios

Scenario 1

[0% GP override; 0% true negatives receive delayed referral]

10,549

(10,532 to 10,567)

505

(502 to 509)

10,044

(10,027 to 10,061)

6.23

(6.20 to 6.25)

5.64

(5.63 to 5.64)

98.0%

(97.9 to 98.1)

100%

(100 to 100)

99.9%

(99.9 to 99.9)

727

(707 to 746)

Scenario 2

[20% GP override; 10% true negatives receive delayed referral]

10,550

(10,532 to 10,567)

505

(502 to 509)

10,044

(10,027 to 10,061)

6.28

(6.25 to 6.31)

6.36

(6.35 to 6.38)

98.4%

(98.3 to 98.5)

98.1%

(98.1 to 98.1)

98.1%

(98.1 to 98.2)

886

(861 to 911)

Service reconfiguration scenarios (applied with Pinpoint Scenario 2 parameters)

No Tues AM clinic

[capacity = 10 new patients + 6 overspills]

10,497

(10,484 to 10,510)

502

(499 to 506)

9,995

(9,982 to 10,008)

7.75

(7.61 to 7.89)

7.83

(7.69 to 7.97)

95.0%

(93.8 to 96.2)

94.8%

(93.7 to 96.0)

94.8%

(93.7 to 96.0)

1,292

(1260 to 1324)

No Weds AM clinic

[capacity = 25 to 34 new patients + 5 overspills]

10,470

(10,453 to 10,487)

498

(495 to 502)

9,972

(9,954 to 9,989)

11.72

(11.69 to 11.75)

11.81

(11.79 to 11.82)

2.9%

(2.3 to 3.4)

2.9%

(2.3 to 3.4)

2.9%

(2.3 to 3.4)

1,632

(1,596 to 1,668)

No Tues AM or Weds AM clinic

10,274

(10,275 to 10,291)

461

(459 to 464)

9,813

(9,796 to 9,830)

12.49

(12.46 to 12.52)

12.58

(12.57 to 12.58)

0.0%

(0.0 to 0.0)

0.0%

(0.0 to 0.0)

0.0%

(0.0 to 0.0)

2,057

(2,042 to 2,071)

  1. BC = breast cancer; CI = confidence interval.