Censored Data Analysis Reveals Effects of Age and Hepatitis C Infection on C-Reactive Protein Levels in Healthy Adult Chimpanzees (Pan troglodytes)

Table 2

Results of Kaplan-Meier analysis of flipped right censored data.

Factor	𝑋^2	Estimated effect sizes
		Factor level 1 (median)	Factor level 2 (median)	Factor level 3 (median)
HCV infection	37.746 (<0.000)**	Infected 0.30	Not infected 0.79	—
Decade of life	4.910 (0.086)	10–19 yr 0.66	20–29 yr 0.66	30+ yr 0.66
Sex	1.561 (0.211)	Male 0.65	Female 0.65	—
Health status	5.051 (0.025)*	Healthy 0.62	Unhealthy 0.79	—
CVD	0.730 (0.393)	No CVD 0.66	CVD 0.66	—

Tarone-Ware 𝑋² statistics (𝑃 value) for 5 covariates (HCV infection, decade of life, sex, health, and CVD). Data was the right censored “flipped” version of the original left-censored data. All 𝑋² tests were on 1 degree of freedom, except decade which used 2 degrees of freedom. Estimated medians were interpolated from the ranked KM results.
^∗𝑃<0.05, ^∗∗𝑃<0.01.