(Regional_LN cohort)
This pipeline uses various statistical tests to identify genes whose promoter methylation levels correlated to selected clinical features.
Testing the association between 17153 genes and 6 clinical features across 109 samples, statistically thresholded by Q value < 0.05, 5 clinical features related to at least one genes.
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6 genes correlated to 'AGE'.
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BBX , ICA1L , KLK4 , EPN3 , GPR63 , ...
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1 gene correlated to 'GENDER'.
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UTP14C
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273 genes correlated to 'DISTANT.METASTASIS'.
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CCNG1 , THAP2 , ZFC3H1 , C9ORF140 , FLJ12825 , ...
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56 genes correlated to 'LYMPH.NODE.METASTASIS'.
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CCDC25 , NOS1AP , MBIP , NGLY1 , NHEDC1 , ...
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31 genes correlated to 'NEOPLASM.DISEASESTAGE'.
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UBE2I , PPP1R9B , ZBTB37 , TUG1 , MRPL11 , ...
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No genes correlated to 'Time to Death'
Complete statistical result table is provided in Supplement Table 1
Clinical feature | Statistical test | Significant genes | Associated with | Associated with | ||
---|---|---|---|---|---|---|
Time to Death | Cox regression test | N=0 | ||||
AGE | Spearman correlation test | N=6 | older | N=6 | younger | N=0 |
GENDER | t test | N=1 | male | N=1 | female | N=0 |
DISTANT METASTASIS | ANOVA test | N=273 | ||||
LYMPH NODE METASTASIS | ANOVA test | N=56 | ||||
NEOPLASM DISEASESTAGE | ANOVA test | N=31 |
Time to Death | Duration (Months) | 1-84.7 (median=12.1) |
censored | N = 26 | |
death | N = 30 | |
Significant markers | N = 0 |
AGE | Mean (SD) | 55.3 (16) |
Significant markers | N = 6 | |
pos. correlated | 6 | |
neg. correlated | 0 |
SpearmanCorr | corrP | Q | |
---|---|---|---|
BBX | 0.4451 | 1.239e-06 | 0.0213 |
ICA1L | 0.4433 | 1.38e-06 | 0.0237 |
KLK4 | 0.4432 | 1.395e-06 | 0.0239 |
EPN3 | 0.4373 | 1.992e-06 | 0.0342 |
GPR63 | 0.434 | 2.42e-06 | 0.0415 |
LOXL4 | 0.431 | 2.894e-06 | 0.0496 |
GENDER | Labels | N |
FEMALE | 33 | |
MALE | 76 | |
Significant markers | N = 1 | |
Higher in MALE | 1 | |
Higher in FEMALE | 0 |
T(pos if higher in 'MALE') | ttestP | Q | AUC | |
---|---|---|---|---|
UTP14C | 8.48 | 3.531e-10 | 6.06e-06 | 0.9418 |
DISTANT.METASTASIS | Labels | N |
M0 | 95 | |
M1 | 1 | |
M1B | 2 | |
M1C | 1 | |
Significant markers | N = 273 |
ANOVA_P | Q | |
---|---|---|
CCNG1 | 5.585e-110 | 9.58e-106 |
THAP2 | 6.432e-33 | 1.1e-28 |
ZFC3H1 | 6.432e-33 | 1.1e-28 |
C9ORF140 | 1.074e-29 | 1.84e-25 |
FLJ12825 | 7.254e-21 | 1.24e-16 |
FAM65C | 2.924e-19 | 5.01e-15 |
EDEM3 | 3.461e-18 | 5.93e-14 |
IFT57 | 1.301e-16 | 2.23e-12 |
CCDC41 | 7.257e-16 | 1.24e-11 |
CASC5 | 1.152e-15 | 1.98e-11 |
LYMPH.NODE.METASTASIS | Labels | N |
N0 | 59 | |
N1 | 1 | |
N1A | 3 | |
N1B | 10 | |
N2 | 1 | |
N2A | 3 | |
N2B | 8 | |
N2C | 1 | |
N3 | 12 | |
NX | 2 | |
Significant markers | N = 56 |
ANOVA_P | Q | |
---|---|---|
CCDC25 | 6.731e-112 | 1.15e-107 |
NOS1AP | 2.584e-58 | 4.43e-54 |
MBIP | 6.27e-55 | 1.08e-50 |
NGLY1 | 3.85e-46 | 6.6e-42 |
NHEDC1 | 1.383e-33 | 2.37e-29 |
TMEM184B | 9.324e-30 | 1.6e-25 |
RNF220 | 1.664e-29 | 2.85e-25 |
C6ORF162 | 5.369e-29 | 9.21e-25 |
DYNC1I2 | 1.523e-28 | 2.61e-24 |
C17ORF63 | 1.724e-19 | 2.96e-15 |
NEOPLASM.DISEASESTAGE | Labels | N |
STAGE I | 15 | |
STAGE IA | 7 | |
STAGE IB | 10 | |
STAGE II | 13 | |
STAGE IIA | 5 | |
STAGE IIB | 5 | |
STAGE IIC | 2 | |
STAGE III | 4 | |
STAGE IIIA | 3 | |
STAGE IIIB | 10 | |
STAGE IIIC | 17 | |
STAGE IV | 3 | |
Significant markers | N = 31 |
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Expresson data file = SKCM-Regional_LN.meth.for_correlation.filtered_data.txt
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Clinical data file = SKCM-Regional_LN.clin.merged.picked.txt
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Number of patients = 109
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Number of genes = 17153
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Number of clinical features = 6
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
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
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
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
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.
This is an experimental feature. The full results of the analysis summarized in this report can be downloaded from the TCGA Data Coordination Center.