Cystatin C-Based Evaluation of Kidney Function of HIV-Infected Children in Benin City, Southern Nigeria

Table 2

Serum cystatin C levels of all study participants in different age groups.

	Serum cystatin C (mg/L)
Age groups(years)	HIV-infected		Controls		Test (𝑡)	𝑑𝑓	𝑃 value
	𝑛	Mean ± SD	𝑛	Mean ± SD
1–4	106	1.00±0.46	107	0.74±0.20	5.49	211	0.000*
5–9	72	1.03±0.43	74	0.69±0.18	6.134	144	0.000*
10–14	23	1.01±0.44	20	0.77±0.28	2.103	41	0.042*
15–17	4	0.89±0.09	4	0.65±0.17	2.481	6	0.048*

𝑡: student’s 𝑡 test, 𝑑𝑓: degree of freedom, *significant at 𝑃<0.05.