TABLE 6.

Mean platelet crit by quartiles of serum cholesterol measures in adult participants in NHANES 2005–2008

	NHANES Survey 2005–2006 (N = 4,469)		NHANES Survey 2007–2008 (N = 5,318)
	Platelet Crit Mean (%)	95% CI	Platelet Crit Mean (%)	95% CI
HDL-C (mg/dl)
Unadjusteda
Low	0.222	0.219, 0.225	0.204	0.198, 0.210
Medium	0.227	0.222, 0.232	0.203	0.199, 0.206
High	0.229	0.224, 0.233	0.206	0.202, 0.210
Very high	0.224	0.220, 0.228	0.204	0.200, 0.208
Trend P value	0.186		0.747
Adjustedb
Low	0.226	0.223, 0.229	0.205	0.200, 0.211
Medium	0.228	0.224, 0.233	0.203	0.200, 0.207
High	0.226	0.222, 0.230	0.205	0.200, 0.209
Very high	0.222	0.218, 0.226	0.201	0.197, 0.206
Trend P value	0.083		0.362
Non-HDL-C (mg/dl)
Unadjusteda
Low	0.216	0.210, 0.222	0.195	0.191, 0.199
Medium	0.224	0.220, 0.227	0.203	0.199, 0.206
High	0.230	0.225, 0.235	0.208	0.203, 0.212
Very high	0.232	0.228, 0.236	0.210	0.206, 0.215
Trend P value	<0.001		<0.001
Adjustedb
Low	0.215	0.209, 0.221	0.194	0.190, 0.198
Medium	0.223	0.221, 0.226	0.202	0.199, 0.206
High	0.230	0.226, 0.235	0.207	0.203, 0.211
Very high	0.233	0.230, 0.236	0.210	0.207, 0.214
Trend P value	<0.001		<0.001

Cholesterol quartiles were determined from NHANES 2005-2006 and are as follows: HDL-C [low (≤41.83 mg/dl), medium (>41.83–51.38 mg/dl), high (>51.38–62.93 mg/dl), and very high (>62.93 mg/dl)]; and nonHDL-C [low (≤114.42 mg/dl), medium (>114.42–140.1 mg/dl), high (>140.1–168.28 mg/dl), and very high (>168.28 mg/dl)]. CI, confidence interval.

^aUnadjusted model.

^bAdjusted for age, race/ethnicity, gender, smoking and BMI.