Cervical Squamous Cell Carcinoma: Correlation between copy number variations of arm-level result and selected clinical features
Maintained by TCGA GDAC Team (Broad Institute/Dana-Farber Cancer Institute/Harvard Medical School)
Overview
Introduction

This pipeline computes the correlation between significant arm-level copy number variations (cnvs) and selected clinical features.

Summary

Testing the association between copy number variation 20 arm-level results and 2 clinical features across 14 patients, no significant finding detected with Q value < 0.25.

  • No arm-level cnvs related to clinical features.

Results
Overview of the results

Table 1.  Get Full Table Overview of the association between significant copy number variation of 20 arm-level results and 2 clinical features. Shown in the table are P values (Q values). Thresholded by Q value < 0.25, no significant finding detected.

Clinical
Features
Time
to
Death
AGE
nCNV (%) nWild-Type logrank test t-test
1q gain 6 (43%) 8 0.0455
(1.00)
0.0583
(1.00)
3p gain 3 (21%) 11 1
(1.00)
0.566
(1.00)
3q gain 8 (57%) 6 0.414
(1.00)
0.939
(1.00)
5p gain 4 (29%) 10 0.617
(1.00)
0.151
(1.00)
6p gain 3 (21%) 11 1
(1.00)
0.905
(1.00)
8q gain 5 (36%) 9 0.617
(1.00)
0.973
(1.00)
20q gain 3 (21%) 11 1
(1.00)
0.42
(1.00)
3p loss 6 (43%) 8 0.617
(1.00)
0.0724
(1.00)
4p loss 6 (43%) 8 0.414
(1.00)
0.671
(1.00)
5p loss 3 (21%) 11 0.414
(1.00)
0.378
(1.00)
5q loss 7 (50%) 7 0.414
(1.00)
0.526
(1.00)
8p loss 4 (29%) 10 0.221
(1.00)
0.236
(1.00)
10p loss 4 (29%) 10 0.617
(1.00)
0.296
(1.00)
10q loss 5 (36%) 9 0.221
(1.00)
0.231
(1.00)
11p loss 6 (43%) 8 0.414
(1.00)
0.157
(1.00)
11q loss 5 (36%) 9 0.414
(1.00)
0.393
(1.00)
12p loss 4 (29%) 10 0.0455
(1.00)
0.0823
(1.00)
13q loss 7 (50%) 7 0.221
(1.00)
0.152
(1.00)
17p loss 5 (36%) 9 0.414
(1.00)
0.938
(1.00)
19p loss 3 (21%) 11 0.414
(1.00)
0.307
(1.00)
Methods & Data
Input
  • Mutation data file = broad_values_by_arm.mutsig.cluster.txt

  • Clinical data file = CESC.clin.merged.picked.txt

  • Number of patients = 14

  • Number of significantly arm-level cnvs = 20

  • Number of selected clinical features = 2

  • Exclude genes that fewer than K tumors have mutations, K = 3

Survival analysis

For survival clinical features, the Kaplan-Meier survival curves of tumors with and without gene mutations were plotted and the statistical significance P values were estimated by logrank test (Bland and Altman 2004) using the 'survdiff' function in R

Student's t-test analysis

For continuous numerical clinical features, two-tailed Student's t test with unequal variance (Lehmann and Romano 2005) was applied to compare the clinical values between tumors with and without gene mutations using 't.test' function in R

Q value calculation

For multiple hypothesis correction, Q value is the False Discovery Rate (FDR) analogue of the P value (Benjamini and Hochberg 1995), defined as the minimum FDR at which the test may be called significant. We used the 'Benjamini and Hochberg' method of 'p.adjust' function in R to convert P values into Q values.

Download Results

This is an experimental feature. The full results of the analysis summarized in this report can be downloaded from the TCGA Data Coordination Center.

References
[1] Bland and Altman, Statistics notes: The logrank test, BMJ 328(7447):1073 (2004)
[2] Lehmann and Romano, Testing Statistical Hypotheses (3E ed.), New York: Springer. ISBN 0387988645 (2005)
[3] Benjamini and Hochberg, Controlling the false discovery rate: a practical and powerful approach to multiple testing, Journal of the Royal Statistical Society Series B 59:289-300 (1995)