Table 4 Peer-group parameter estimates from multilevel logistic regression analysis for three binary outcomes

Model

Principal Referral B^a

Major Metro and Non-Metro^a

Principal Referral B^a

Major Metro and Non-Metro^a

Principal Referral B^a

Major Metro and Non-Metro^a

b (95 % CI)

b (95 % CI)

b (95 % CI)

b (95 % CI)

b (95 % CI)

b (95 % CI)

Base

1.83 (1.12, 2.55)

1.24 (0.60, 1.87)

0.17 (−0.50, 0.84)

0.11 (−0.43, 0.66)

0.27 (−0.34, 0.87)

0.31 (−0.17, 0.79)

Base + ASA

1.87 (1.14, 2.61)

1.32 (0.67, 1.96)

0.08 (−0.65, 0.81)

0.21 (−0.37, 0.79)

0.27 (−0.34, 0.88)

0.33 (−0.15, 0.81)

Base + ECOG

1.67 (0.94, 2.40)

1.24 (0.60, 1.88)

0.03 (−0.67, 0.72)

0.10 (−0.46, 0.65)

0.47 (−0.15, 1.09)

0.31 (−0.17, 0.80)

Base + ASA + ECOG

1.70 (0.95, 2.45)

1.31 (0.66, 1.97)

−0.08 (−0.83, 0.68)

0.20 (−0.39, 0.78)

0.48 (−0.15, 1.10)

0.34 (−0.15, 0.83)