This pipeline uses various statistical tests to identify selected clinical features related to mutation rate.
Testing the association between 2 variables and 12 clinical features across 306 samples, statistically thresholded by P value < 0.05 and Q value < 0.3, 5 clinical features related to at least one variables.
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2 variables correlated to 'AGE'.
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MUTATIONRATE_SILENT , MUTATIONRATE_NONSYNONYMOUS
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2 variables correlated to 'AGE_mutation.rate'.
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MUTATIONRATE_SILENT , MUTATIONRATE_NONSYNONYMOUS
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2 variables correlated to 'NEOPLASM.DISEASESTAGE'.
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MUTATIONRATE_NONSYNONYMOUS , MUTATIONRATE_SILENT
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2 variables correlated to 'PATHOLOGY.T.STAGE'.
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MUTATIONRATE_SILENT , MUTATIONRATE_NONSYNONYMOUS
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2 variables correlated to 'NUMBERPACKYEARSSMOKED'.
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MUTATIONRATE_NONSYNONYMOUS , MUTATIONRATE_SILENT
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No variables correlated to 'Time to Death', 'PATHOLOGY.N.STAGE', 'GENDER', 'RADIATIONS.RADIATION.REGIMENINDICATION', 'NUMBER.OF.LYMPH.NODES', 'RACE', and 'ETHNICITY'.
Complete statistical result table is provided in Supplement Table 1
Clinical feature | Statistical test | Significant variables | Associated with | Associated with | ||
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Time to Death | Cox regression test | N=0 | ||||
AGE | Spearman correlation test | N=2 | older | N=2 | younger | N=0 |
AGE | Linear Regression Analysis | N=2 | ||||
NEOPLASM DISEASESTAGE | Kruskal-Wallis test | N=2 | ||||
PATHOLOGY T STAGE | Spearman correlation test | N=2 | higher stage | N=2 | lower stage | N=0 |
PATHOLOGY N STAGE | Spearman correlation test | N=0 | ||||
GENDER | Wilcoxon test | N=0 | ||||
RADIATIONS RADIATION REGIMENINDICATION | Wilcoxon test | N=0 | ||||
NUMBERPACKYEARSSMOKED | Spearman correlation test | N=2 | higher numberpackyearssmoked | N=2 | lower numberpackyearssmoked | N=0 |
NUMBER OF LYMPH NODES | Spearman correlation test | N=0 | ||||
RACE | Kruskal-Wallis test | N=0 | ||||
ETHNICITY | Wilcoxon test | N=0 |
Time to Death | Duration (Years) | 2-3837 (median=896) |
censored | N = 170 | |
death | N = 89 | |
Significant variables | N = 0 |
AGE | Mean (SD) | 61.13 (12) |
Significant variables | N = 2 | |
pos. correlated | 2 | |
neg. correlated | 0 |
AGE | Mean (SD) | 61.13 (12) |
Significant variables | N = 2 |
NEOPLASM.DISEASESTAGE | Labels | N |
STAGE I | 17 | |
STAGE II | 46 | |
STAGE III | 42 | |
STAGE IVA | 149 | |
STAGE IVB | 6 | |
Significant variables | N = 2 |
PATHOLOGY.T.STAGE | Mean (SD) | 2.91 (1) |
N | ||
1 | 24 | |
2 | 77 | |
3 | 63 | |
4 | 101 | |
Significant variables | N = 2 | |
pos. correlated | 2 | |
neg. correlated | 0 |
PATHOLOGY.N.STAGE | Mean (SD) | 1.04 (0.96) |
N | ||
0 | 99 | |
1 | 33 | |
2 | 99 | |
3 | 5 | |
Significant variables | N = 0 |
GENDER | Labels | N |
FEMALE | 84 | |
MALE | 222 | |
Significant variables | N = 0 |
No variable related to 'RADIATIONS.RADIATION.REGIMENINDICATION'.
RADIATIONS.RADIATION.REGIMENINDICATION | Labels | N |
NO | 81 | |
YES | 225 | |
Significant variables | N = 0 |
NUMBERPACKYEARSSMOKED | Mean (SD) | 49.82 (37) |
Significant variables | N = 2 | |
pos. correlated | 2 | |
neg. correlated | 0 |
NUMBER.OF.LYMPH.NODES | Mean (SD) | 2.74 (5.3) |
Significant variables | N = 0 |
RACE | Labels | N |
AMERICAN INDIAN OR ALASKA NATIVE | 1 | |
ASIAN | 5 | |
BLACK OR AFRICAN AMERICAN | 28 | |
WHITE | 265 | |
Significant variables | N = 0 |
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Expresson data file = HNSC-TP.patients.counts_and_rates.txt
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Clinical data file = HNSC-TP.merged_data.txt
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Number of patients = 306
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Number of variables = 2
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Number of clinical features = 12
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 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 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 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.
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.