Preprocessing of clinical data
Overview
Introduction

The clinical information for each TCGA tumor sample is stored in a xml file. Patient ID, tumor and treatment info are entries of the xml file. These xml files have been preprocessed for further analysis.

Summary

Clinical data for tier 1 clinical variables are generated.

Table 1.  Tier1 clinical variables

Tumor.Feature Date.Statistics
gender dccuploaddate
primarysiteofdesease dateofbirth
histologicaltype dateofdeath
tumorstage dateoflastfollowup
tumorgrade dateoftumorrecurrence
patienttumorrecurrencestatus dateofinitialpathologicdiagnosis
radiationtherapy datelastknownalive
neoadjuvanttherapy vitalstatus
pathologicspread(pt)
pathologicspread(pn)
karnofskyperformancescore
Results
Tier 1 Data Statistics

Table 2.  Statistics of selected clinical variables.

Clinical.Variable Statistics
age mean: 61, std: 13
vitalstatus 2676 living, 1206 deceased
gender 2628 female, 1244 male
histologicaltype 364 colon adenocarcinoma, 56 colon mucinous adenocarcinoma, 23 untreated primary (de novo) gbm, 2 treated primary gbm, 502 kidney clear cell renal carcinoma, 317 lung squamous cell carcinoma- not otherwise specified (nos), 7 lung basaloid squamous cell carcinoma, 1 lung small cell squamous cell carcinoma, 1 lung papillary squamous cell caricnoma, 1 lung papillary squamous cell carcinoma, 570 serous cystadenocarcinoma, 149 rectal adenocarcinoma, 13 rectal mucinous adenocarcinoma, 79 serous endometrial adenocarcinoma, 333 endometrioid endometrial adenocarcinoma, 18 mixed serous and endometrioid, 7 endometrioid endometrial adenocarcinoma (grade 3), 3 endometrioid endometrial adenocarcinoma (grade 1 or 2), 9 endometrioid endometrial adenocarcinoma (grade 1), 2 endometrioid endometrial adenocarcinoma (grade 2)
patienttumorrecurrencestatus 3882 without recurrence
tumorgrade 248 grade 3, 106 grade 2, 90 grade 1, 7 high grade
tumorstage 185 stage iia, 92 stage iiib, 70 stage iib, 45 stage iiic, 140 stage iv, 346 stage i, 26 stage iva, 4 stage iic, 97 stage ii, 152 stage iii, 66 stage iiia, 1 stage ivb, 56 stage ia, 111 stage ib, 403 iiic, 3 ib, 24 iiib, 87 iv, 19 iic, 3 ia, 8 iiia, 10 ic, 4 iib, 3 iia
pathologicspread(pt) 439 t3, 8 t4b, 57 t4, 306 t2, 24 t4a, 84 t1, 1 t0, 1 tis, 127 t1b, 52 t3b, 137 t1a, 42 t2a, 120 t3a, 2 t3c, 17 t2b
pathologicspread(pn) 776 n0, 213 n1, 110 n2, 17 n1b, 15 n2b, 7 n2a, 17 n1a, 3 n1c, 255 nx, 5 n3
Tier 1 Data

Table 3.  Get Full Table Illustration of the tier 1 data for three patients

Clinical.Variable Sample_1 Sample_2 Sample_3
yearstobirth 70 59 56
daystodeath NA NA NA
daystolastfollowup 259 437 1320
vitalstatus 0 0 0
dccuploaddate 17-8-2012 17-8-2012 17-8-2012
Methods & Data
Work Flow

1. Each xml file is converted to a tab-delimited text file by our R package.

2. All text files are aggregated into one big table by the Clinical_Aggregate_Tier1 pipeline. The 1st column of the table is the entry name of the xml file and the rest columns are the associated data for samples.

3. Data for the tier 1 clinical variables are extracted by the Clinical_Picker_Tier1 pipeline.

Diagram of Clinical Data Dicer

Figure 1.  Diagram that displays the work flow of processing clinical data. Clinical variables of interest and their associated values are marked in red and blue, respectively.