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Table 1 Summary of the data and characteristics of the colorectal cancer trial patients

From: Comparison of imputation methods for handling missing covariate data when fitting a Cox proportional hazards model: a resampling study

Characteristic

Label

Level

N(%)

Age (years)

Age

Median (IQR)

62 (55-68)

  

Mean(SD)

61 (9.95)

Sex

Sex

1 = Female

3013(40%)

  

2 = Male

4494(60%)

Site of Cancer

Site

0 = Colon only

5197(69%)

  

1 = Rectum/both

2310(31%)

Stage

Stage

0 = Dukes' A/B

3775(50%)

  

1 = Dukes' C

3732(50%)

Pre-operative

PRE-RT

1 = No

7147(95%)

RT

 

2 = Yes

360(5%)

Post-operative RT

POST-RT

1 = No

6511(87%)

planned

 

2 = Yes

996(13%)

Indication for

CT-INDIC

1 = Clear

4320(58%)

CT

 

2 = Uncertain

3187(42%)

CT Schedule

CT-SCH

1 = Every week

3757(50%)

  

2 = Every 4 weeks

3750(50%)

  1. Key: IQR = Inter-quartile range, SD = standard deviation, RT = radiotherapy, CT = Chemotherapy