Table 4 Regression output for the TRF validation model

cTRF2 (25–75%)

-0.592 (0.31)^a

-0.124 (0.404)

0.278 (0.326)

-0.368 (0.308)

1.165 (0.317)^c

cTRF3 (75–100%)

0.379 (0.349)

0.179 (0.44)

-1 (0.453)^b

0.029 (0.353)

1.422 (0.37)^c

Age group 1 (age < 2)

0.952 (0.445)^b

0.822 (0.437)^a

0.798 (0.446)^a

0.808 (0.44)^a

0.791 (0.449)^a

Age group 2 (2 ≤ age < 5)

-4.379 (1.337)^c

-5.084 (1.327)^c

-5.486 (1.383)^c

-5.06 (1.346)^c

-5.378 (1.337)^c

Age group 3 (5 ≤ age < 15)

-1.639 (0.66)^b

-1.745 (0.662)^c

-1.513 (0.659)^b

-1.505 (0.678)^b

-1.705 (0.664)^b

Age group 4 (age ≥ 15)

-3.686 (1.513)^b

-4.39 (1.504)^c

-5.086 (1.558)^c

-4.485 (1.529)^c

-4.944 (1.522)^c

Incidence rate type dummy (population based vs. hospital based)

-3.278 (0.601)^c

-3.396 (0.64)^c

-4.139 (0.658)^c

-3.391 (0.6)^c

-3.58 (0.599)^c

Interaction variable1 (age group 1 X incidence rate type dummy)

omitted

omitted

omitted

omitted

omitted

Interaction variable2 (age group 2 X incidence rate type dummy)

5.702 (1.39)^c

6.277 (1.388)^c

6.64 (1.439)^c

6.294 (1.408)^c

6.53 (1.393)^c

Interaction variable3 (age group 3 X incidence rate type dummy)

2.357 (0.779)^c

2.223 (0.776)^c

1.905 (0.783)^b

2.056 (0.785)^c

2.236 (0.781)^c

Interaction variable4 (age group 4 X incidence rate type dummy)

3.255 (1.597)^b

4.005 (1.582)^b

4.608 (1.637)^c

4.188 (1.618)^c

4.509 (1.605)^c

Constant

3.521 (0.529)^c

4.391 (0.512)^c

5.086 (0.655)^c

4.485 (0.58)^c

3.521 (0.529)^c

Log likelihood

-225.434

-230.207

-225.987

-229.632

-222.464

AIC

472.8678

482.4148

473.9739

481.2634

466.929

BIC

-243.245

-233.698

-242.139

-234.849

-249.184