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Table 2 Transformation rules and the study population characteristics

From: Exploring cancer register data to find risk factors for recurrence of breast cancer – application of Canonical Correlation Analysis

Variable

Categories

Coded as

n

Age

>50 years

0

177

 

≤ 50 years

1

459

Tumor location

(not) Superior medial

(0)1

144

 

(not) Inferior medial

(0)1

70

 

(not) Superior lateral

(0)1

368

 

(not) Inferior lateral

(0)1

112

 

(not) Nipple area

(0)1

58

Side

Left

0

315

 

Right

1

322

Tumor Size

≤ 20 mm

0

233

 

>20 mm

1

404

LN involvement

No LN involvement

0

373

 

Positive LN involvement

1

260

LN involvement (N0)

No palpable LN

0

100

 

Palpable and/or fixed LNs

1

533

Periglandular growth

Absence of growth

0

515

 

Presence of growth

1

122

Nottingham Histologic Grade

I

1

145

 

II

2

228

 

III

3

264

Multiple tumors

Absence of multiple tumors

0

502

 

Presence of multiple tumors

1

134

Estrogen receptor

≥ 0.3 fmol/mg

0

181

 

<0.3 fmol/mg

1

456

Progesterone receptor

≥ 0.3 fmol/mg

0

232

 

<0.3 fmol/mg

1

405

S-phase fraction

<10%

0

439

 

≥ 10%

1

198

DNA index (DI)

0.9 ≤ DI and DI < 1.3

0

345

 

0.9 > DI or DI ≥ 1.3

1

292

DNA ploidy

DNA diploidy or tetraploidy

0

368

 

DNA aneuploid

1

269