Table 2.

Means and Standard Deviations of the Physiologic Variables and Correlations of Physiologic Measures With Fatigue Intensity and Fatigue-Related Impairment of Functioning

				Standardized Coefficientb
Measure	n	Mean ± SD	Range	Fatigue Intensityc	Fatigue-Related Impairment of Functioningc
Hepatic function
Aspartate aminotranspertase	125	39.54 ± 23.48	12–153	0.075	−0.237
Alanine aminotranspertase	125	40.69 ± 29.48	11–154	−0.064	−0.203
Gamma glutamyl transpeptidasea	124	78.69 ± 87.00	7–537	−0.006	0.004
Alkaline phosphatase	125	99.45 ± 38.80	50–287	0.256	−0.110
Total bilirubina	125	0.65 ± 0.70	0.09–4.10	−0.176	0.242
Hepatitis C status (dichotomous)	127	0.25 ± 0.44	0–1	0.106	−0.281
Thyroid function
Thyroid-stimulating hormone	127	1.59 ± 1.53	0.33–16.45	−0.305	0.238
Thyroxine	128	0.73 ± 0.12	0.49–1.21	0.164	−0.106
HIV RNA viral loada	128	17071 ± 72729	<50–>750,000	0.285	−0.038
Immunologic function
CD4 count	128	517.52 ± 342.98	29–1755	−0.242	−0.019
CD4 percent	128	24.31 ± 11.48	3–54	−0.287	0.019
CD8	125	1063 ± 524	294–2767	−0.362+	−0.467*
T4/T8 ratioa	125	0.84 ± 2.50	0.04–28.00	−0.080	−0.080
CD16 count	124	47.16 ± 80.96	0–499	0.058	−0.230
CD16 percent	124	2.30 ± 3.37	0–20	−0.026	0.171
CD38 on CD8	125	68.64 ± 15.11	38–97	0.064	0.045
Gonadal function
Total testosterone	128	388.49 ± 324.66	7–1630	−0.184	−0.312
Free testosterone	124	8.77 ± 7.30	0.09–32.1	−0.419*	−0.253
Dehydroepiandrosterone	127	118.32 ± 88.49	14–421	−0.305	−0.366+
Hematologic function
Hemoglobin	127	14.23 ± 1.81	9.8–19	−0.213	−0.201
Hematocrit	127	0.43 ± 0.05	0.3–0.55	−0.127	−0.224
Serum erythropoietina	126	18.25 ± 27.87	2.9–289	−0.025	−0.023
Cellular injury
Lactic acid	127	76.16 ± 8.84	43–92	−0.096	−0.175

^aLog-transformed in regression models to reduce skew.

^bFrom bivariate ordinary least squares regression models; coefficients standardized to represent the expected change in fatigue score associated with a one-standard-deviation change in the physiologic measure.

^cFatigue scores could range from 1 to 10.

⁺p < 0.10.

^*p < 0.05.