Correlation between miRseq expression and clinical features

Uterine Corpus Endometrioid Carcinoma (Primary solid tumor)

23 September 2013 | analyses__2013_09_23

Maintainer Information

Citation Information

Maintained by Juok Cho (Broad Institute)

Cite as Broad Institute TCGA Genome Data Analysis Center (2013): Correlation between miRseq expression and clinical features. Broad Institute of MIT and Harvard. doi:10.7908/C1MK6B8H

Overview

Introduction

This pipeline uses various statistical tests to identify miRs whose expression levels correlated to selected clinical features.

Summary

Testing the association between 556 genes and 5 clinical features across 469 samples, statistically thresholded by Q value < 0.05, 4 clinical features related to at least one genes.

3 genes correlated to 'Time to Death'.

HSA-MIR-497 , HSA-LET-7G , HSA-LET-7B

45 genes correlated to 'AGE'.

HSA-MIR-424 , HSA-MIR-1247 , HSA-MIR-337 , HSA-MIR-935 , HSA-MIR-199A-1 , ...

102 genes correlated to 'HISTOLOGICAL.TYPE'.

HSA-MIR-9-3 , HSA-MIR-9-2 , HSA-MIR-9-1 , HSA-MIR-934 , HSA-MIR-34A , ...

9 genes correlated to 'RADIATIONS.RADIATION.REGIMENINDICATION'.

HSA-MIR-3613 , HSA-MIR-128-1 , HSA-MIR-128-2 , HSA-MIR-107 , HSA-MIR-628 , ...

No genes correlated to 'COMPLETENESS.OF.RESECTION'

Results

Overview of the results

Complete statistical result table is provided in Supplement Table 1

Table 1. Get Full Table This table shows the clinical features, statistical methods used, and the number of genes that are significantly associated with each clinical feature at Q value < 0.05.

Clinical feature	Statistical test	Significant genes	Associated with		Associated with
Time to Death	Cox regression test	N=3	shorter survival	N=0	longer survival	N=3
AGE	Spearman correlation test	N=45	older	N=4	younger	N=41
HISTOLOGICAL TYPE	ANOVA test	N=102
RADIATIONS RADIATION REGIMENINDICATION	t test	N=9	yes	N=6	no	N=3
COMPLETENESS OF RESECTION	ANOVA test	N=0

Clinical variable #1: 'Time to Death'

3 genes related to 'Time to Death'.

Table S1. Basic characteristics of clinical feature: 'Time to Death'


Time to Death	Duration (Months)	0-191.8 (median=20.9)
	censored	N = 413
	death	N = 53

	Significant markers	N = 3
	associated with shorter survival	0
	associated with longer survival	3

List of 3 genes significantly associated with 'Time to Death' by Cox regression test

Table S2. Get Full Table List of 3 genes significantly associated with 'Time to Death' by Cox regression test

	HazardRatio	Wald_P	Q	C_index
HSA-MIR-497	0.66	1.653e-05	0.0092	0.336
HSA-LET-7G	0.51	2.347e-05	0.013	0.337
HSA-LET-7B	0.6	8.118e-05	0.045	0.293

Figure S1. Get High-res Image As an example, this figure shows the association of HSA-MIR-497 to 'Time to Death'. four curves present the cumulative survival rates of 4 quartile subsets of patients. P value = 1.65e-05 with univariate Cox regression analysis using continuous log-2 expression values.

Clinical variable #2: 'AGE'

45 genes related to 'AGE'.

Table S3. Basic characteristics of clinical feature: 'AGE'


AGE	Mean (SD)	63.66 (11)
	Significant markers	N = 45
	pos. correlated	4
	neg. correlated	41

List of top 10 genes significantly correlated to 'AGE' by Spearman correlation test

Table S4. Get Full Table List of top 10 genes significantly correlated to 'AGE' by Spearman correlation test

	SpearmanCorr	corrP	Q
HSA-MIR-424	-0.3223	9.039e-13	5.03e-10
HSA-MIR-1247	-0.2656	6.231e-09	3.46e-06
HSA-MIR-337	-0.2469	6.245e-08	3.46e-05
HSA-MIR-935	0.2677	7.937e-08	4.39e-05
HSA-MIR-199A-1	-0.2374	2.03e-07	0.000112
HSA-MIR-516A-1	0.3031	2.114e-07	0.000116
HSA-MIR-214	-0.2361	2.441e-07	0.000134
HSA-MIR-409	-0.2358	2.464e-07	0.000135
HSA-MIR-34A	-0.2356	2.513e-07	0.000138
HSA-MIR-199A-2	-0.2331	3.396e-07	0.000186

Figure S2. Get High-res Image As an example, this figure shows the association of HSA-MIR-424 to 'AGE'. P value = 9.04e-13 with Spearman correlation analysis. The straight line presents the best linear regression.

Clinical variable #3: 'HISTOLOGICAL.TYPE'

102 genes related to 'HISTOLOGICAL.TYPE'.

Table S5. Basic characteristics of clinical feature: 'HISTOLOGICAL.TYPE'


HISTOLOGICAL.TYPE	Labels	N
	ENDOMETRIOID ENDOMETRIAL ADENOCARCINOMA	362
	MIXED SEROUS AND ENDOMETRIOID	18
	SEROUS ENDOMETRIAL ADENOCARCINOMA	89

	Significant markers	N = 102

List of top 10 genes differentially expressed by 'HISTOLOGICAL.TYPE'

Table S6. Get Full Table List of top 10 genes differentially expressed by 'HISTOLOGICAL.TYPE'

	ANOVA_P	Q
HSA-MIR-9-3	2.203e-33	1.22e-30
HSA-MIR-9-2	5.277e-30	2.93e-27
HSA-MIR-9-1	6.31e-30	3.5e-27
HSA-MIR-934	3.937e-25	2.18e-22
HSA-MIR-34A	1.663e-21	9.18e-19
HSA-MIR-375	1.059e-19	5.83e-17
HSA-MIR-195	3.877e-19	2.13e-16
HSA-MIR-221	4.03e-19	2.21e-16
HSA-MIR-190B	1.024e-18	5.61e-16
HSA-MIR-452	1.145e-18	6.26e-16

Figure S3. Get High-res Image As an example, this figure shows the association of HSA-MIR-9-3 to 'HISTOLOGICAL.TYPE'. P value = 2.2e-33 with ANOVA analysis.

Clinical variable #4: 'RADIATIONS.RADIATION.REGIMENINDICATION'

9 genes related to 'RADIATIONS.RADIATION.REGIMENINDICATION'.

Table S7. Basic characteristics of clinical feature: 'RADIATIONS.RADIATION.REGIMENINDICATION'


RADIATIONS.RADIATION.REGIMENINDICATION	Labels	N
	NO	131
	YES	338

	Significant markers	N = 9
	Higher in YES	6
	Higher in NO	3

List of 9 genes differentially expressed by 'RADIATIONS.RADIATION.REGIMENINDICATION'

Table S8. Get Full Table List of 9 genes differentially expressed by 'RADIATIONS.RADIATION.REGIMENINDICATION'

	T(pos if higher in 'YES')	ttestP	Q	AUC
HSA-MIR-3613	-5.21	3.665e-07	0.000204	0.6549
HSA-MIR-128-1	4.94	1.322e-06	0.000734	0.6401
HSA-MIR-128-2	4.72	3.686e-06	0.00204	0.6316
HSA-MIR-107	4.56	7.554e-06	0.00418	0.6194
HSA-MIR-628	-4.54	8.46e-06	0.00467	0.6273
HSA-MIR-181D	4.36	1.855e-05	0.0102	0.6296
HSA-MIR-361	4.34	2.05e-05	0.0113	0.6183
HSA-MIR-146A	-4.21	3.541e-05	0.0194	0.6175
HSA-MIR-103-1	3.99	8.724e-05	0.0478	0.6166

Figure S4. Get High-res Image As an example, this figure shows the association of HSA-MIR-3613 to 'RADIATIONS.RADIATION.REGIMENINDICATION'. P value = 3.67e-07 with T-test analysis.

Clinical variable #5: 'COMPLETENESS.OF.RESECTION'

No gene related to 'COMPLETENESS.OF.RESECTION'.

Table S9. Basic characteristics of clinical feature: 'COMPLETENESS.OF.RESECTION'


COMPLETENESS.OF.RESECTION	Labels	N
	R0	322
	R1	24
	R2	15
	RX	26

	Significant markers	N = 0

Methods & Data

Input

Expresson data file = UCEC-TP.miRseq_RPKM_log2.txt
Clinical data file = UCEC-TP.clin.merged.picked.txt
Number of patients = 469
Number of genes = 556
Number of clinical features = 5

Survival analysis

For survival clinical features, Wald's test in univariate Cox regression analysis with proportional hazards model (Andersen and Gill 1982) was used to estimate the P values using the 'coxph' function in R. Kaplan-Meier survival curves were plot using the four quartile subgroups of patients based on expression levels

Correlation analysis

For continuous numerical clinical features, Spearman's rank correlation coefficients (Spearman 1904) and two-tailed P values were estimated using 'cor.test' function in R

ANOVA analysis

For multi-class clinical features (ordinal or nominal), one-way analysis of variance (Howell 2002) was applied to compare the log2-expression levels between different clinical classes using 'anova' function in R

Student's t-test analysis

For two-class clinical features, two-tailed Student's t test with unequal variance (Lehmann and Romano 2005) was applied to compare the log2-expression levels between the two clinical classes 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

In addition to the links below, the full results of the analysis summarized in this report can also be downloaded programmatically using firehose_get, or interactively from either the Broad GDAC website or TCGA Data Coordination Center Portal.

References

[1] Andersen and Gill, Cox's regression model for counting processes, a large sample study, Annals of Statistics 10(4):1100-1120 (1982)

[2] Spearman, C, The proof and measurement of association between two things, Amer. J. Psychol 15:72-101 (1904)

[3] Howell, D, Statistical Methods for Psychology. (5th ed.), Duxbury Press:324-5 (2002)

[4] Lehmann and Romano, Testing Statistical Hypotheses (3E ed.), New York: Springer. ISBN 0387988645 (2005)

[5] 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)

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