Table 5.

Correlation of biochemical indices with hair Fe, Zn and Cu in all control and diabetic subjects

Parameter		Fe hair		Zn hair		Cu hair		Cu/Zn hair
		r	p	r	p	r	p	r	p
FSG	Control	0.122	ns	0.043	ns	0.283	ns	0.122	ns
	Diabetic	0.204	ns	− 0.280	ns	− 0.114	ns	0.081	ns
Insulin	Control	0.419	0.019	0.311	ns	− 0.101	ns	− 0.040	ns
	Diabetic	− 0.211	ns	− 0.137	ns	0.114	ns	0.449	0.047
HbA1c	Control	− 0.066	ns	0.165	ns	0.332	ns	0.038	ns
	Diabetic	0.181	ns	− 0.146	ns	− 0.070	ns	0.141	ns
HOMA-IR	Control	0.418	0.022	0.291	ns	0.104	ns	0.044	ns
	Diabetic	0.018	ns	− 0.126	ns	0.027	ns	0.231	ns
T-CHOL	Control	0.031	ns	− 0.039	ns	0.003	ns	− 0.079	ns
	Diabetic	0.381	ns	− 0.204	ns	− 0.362	ns	− 0.172	ns
TAG	Control	0.102	ns	− 0.118	ns	− 0.291	0.119	− 0.128	ns
	Diabetic	− 0.155	ns	− 0.300	ns	− 0.308	0.174	0.086	ns

FSG fasting serum glucose concentration, HbA1c glycated haemoglobin, HOMA-IR homeostasis model assessment for insulin resistance, T-CHOL total cholesterol concentration, TAG triacylglycerol concentration, r Spearman’s rank correlation coefficient, p probability value for correlation, ns non-significant