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Table 6 Covariate fixed effects from multilevel discrete-time and Bayesian spatial survival models

From: Comparing multilevel and Bayesian spatial random effects survival models to assess geographical inequalities in colorectal cancer survival: a case study

Variable

Multilevel model: OR (95% CrI)1

Spatial model: RR (95%CrI)2

Area-level variables

  

Area-Remoteness Index of Australia

  

Major city

1.00

1.00

Inner regional

0.95 (0.88, 1.02)

0.98 (0.89, 1.07)

Outer regional

1.09 (1.01, 1.18)

1.06 (1.01, 1.19)

Remote

1.15 (1.02, 1.28)

1.09 (1.01, 1.21)

Relative socioeconomic advantage and disadvantage

  

Most advantaged

1.00

1.00

Advantaged

1.14 (1.03, 1.23)

1.08 (1.01, 1.17)

Middle

1.18 (1.08, 1.29)

1.15 (1.06, 1.25)

Disadvantaged

1.22 (1.11, 1.34)

1.17 (1.07, 1.28)

Most disadvantaged

1.23 (1.10, 1.36)

1.18 (1.07, 1.32)

Individual-level variables

modeled at unit record

modeled as aggregated data

Age group

  

20 to 49

0.24 (0.21, 0.27)

0.29 (0.26, 0.32)

50 to 59

0.29 (0.26, 0.32)

0.35 (0.32, 0.38)

60 to 69

0.42 (0.39, 0.46)

0.48 (0.45, 0.52)

70-79

0.68 (0.63, 0.73)

0.73 (0.69, 0.77)

80-85

1.00

1.00

Gender

  

Male

1.00

1.00

Female

1.08 (1.02, 1.14)

1.07 (1.02, 1.13)

Marital status

  

Married

1.00

1.00

Never married/single

1.33 (1.21, 1.46)

1.31 (1.20, 1.40)

Widowed

1.11 (1.03, 1.19)

1.09 (1.02, 1.15)

Divorced

1.18 (1.08, 1.29)

1.16 (1.08, 1.25)

Separated

0.94 (0.77, 1.13)

0.95 (0.81, 1.15)

Not stated

1.32 (1.02, 1.68)

1.36 (1.08, 1.69)

Occupation category

  

Professional

1.00

1.00

White collar

1.11 (1.02, 1.20)

1.07 (1.01, 1.15)

Blue collar

1.38 (1.29, 1.49)

1.29 (1.22, 1.37)

Not in labor force

0.46 (0.43, 0.50)

0.52 (0.49, 0.56)

Not stated/Inadequately described

0.35 (0.32, 0.39)

0.39 (0.35, 0.42)

Country of birth

  

Australia

1.00

1.00

Other English-speaking

0.96 (0.90, 1.02)

0.95 (0.92, 1.00)

Non-English-speaking

0.88 (0.76, 0.97)

0.87 (0.78, 0.98)

Indigenous status

  

Non Indigenous

1.00

1.00

Indigenous

1.16 (0.89, 1.49)

1.12 (0.97, 1.38)

Not stated

0.45 (0.39, 0.51)

0.48 (0.42, 0.54)

Site

  

Proximal (R) colon

1.02 (1.01, 1.08)

1.06 (1.01, 1.11)

Distal (L) colon

1.03 (0.96, 1.10)

1.07 (1.01, 1.13)

Colon NOS

1.04 (1.01, 1.16)

1.08 (1.00, 1.18)

Rectal

1.00

1.00

Stage

  

Stage I

1.00

1.00

Stage II

1.61 (1.47, 1.77)

1.57 (1.44, 1.71)

Stage III

3.17 (2.91, 3.45)

2.85 (2.64, 3.10)

Stage IV

11.41 (10.30, 12.57)

7.88 (7.23, 8.59)

Unknown stage

2.09 (1.86, 2.34)

2.10 (1.91, 2.32)

Differentiation

  

Well differentiated

1.00

1.00

Moderately differentiated

1.14 (1.01, 1.29)

1.18 (1.06, 1.32)

Poorly differentiated

1.64 (1.44, 1.87)

1.65 (1.47, 1.85)

Not stated differentiation

1.25 (1.09, 1.43)

1.35 (1.20, 1.52)

Surgical margins

  

Clear

1.00

1.00

Positive

1.42 (1.19, 1.66)

1.37 (1.19, 1.57)

Unknown margin

1.84 (1.68, 2.01)

1.73 (1.61, 1.85)

  1. CrI Credible Interval OR Odds Ratios, RR Relative Risk ratios.
  2. 1. Estimates derived from best fitting fully adjusted Model 5 as described in text.
  3. 2. Estimates derived from best fitting fully adjusted Model 11 as described in text.