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Table 3 Model parameter estimates for different fractional polynomial network meta-analysis models.

From: Network meta-analysis of survival data with fractional polynomials

  

Fixed effects model, first order fractional polynomial

Fixed effects model, second order fractional polynomial

Random effects model (d0), second order fractional polynomial

  

Median of posterior distribution

95% Credible Interval

Median of posterior distribution

95% Credible Interval

Median of posterior distribution

95% Credible Interval

p1

power 1

-2

 

-2

 

-2

 

p2

power 2

  

1

 

1

 

Pooled estimate for difference in β 0

d 0AB

gefitinib vs. docetaxel

-0.003

(-0.111; 0.112)

0.158

(-0.065; 0.409)

0.144

(-0.156; 0.411)

d 0AC

BSC vs. docetaxel

0.770

(0.598; 0.939)

1.674

(1.108; 2.193)

1.653

(1.039; 2.167)

d 0AD

pemetrexed vs. docetaxel

0.020

(-0.189; 0.243)

0.141

(-0.483; 0.744)

0.142

(-0.540; 0.761)

Pooled estimate for difference in β 1

d 1AB

gefitinib vs. docetaxel

0.634

(-0.429; 1.726)

-0.003

(-1.470; 1.362)

0.070

(-1.330; 1.542)

d 1AC

BSC vs. docetaxel

-2.507

(-4.281; -0.783)

-5.858

(-8.503; -3.228)

-5.839

(-8.265; -3.131)

d 1AD

pemetrexed vs. docetaxel

-0.995

(-3.344; 1.381)

-1.359

(-4.604; 1.885)

-1.368

(-4.511; 1.814)

Pooled estimate for difference in β 2

d 2AB

gefitinib vs. docetaxel

  

-0.007

(-0.016; 0.002)

-0.006

(-0.015; 0.003)

d 2AC

BSC vs. docetaxel

  

-0.053

(-0.082; -0.023)

-0.052

(-0.079; -0.023)

d 2AD

pemetrexed vs. docetaxel

  

-0.005

(-0.032; 0.023)

-0.005

(-0.031; 0.022)

σ d0

Standard deviation of d 0 ; heterogeneity in difference of β 0 across comparisons

    

0.060

(0.002; 0.406)