Quantile regression for the statistical analysis of immunological data with many non-detects.

BMC Immunol · 2012 · PMC3447667 · PMID 22769433

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a slightly increasing trendno p-value reported

Because this line showed a slightly increasing trend, “time point” was incorporated as an additional factor (i.e. with a separate coefficient for each time point) in the analysis on the effect of age.

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