[Table/Fig-1]:

ECG changes in different hemoglobin groups

		ECG changes
		Tachycardia		LVH		STD		Tw
Group	N	n	%	n	%	N	%	n	%
Group 1	4	3	75	1	25	3	75	2	50
Group 2	4	4	100	1	25	3	75	1	25
Group 3	7	7	100	2	29	5	71	2	29
Group 4	13	10	76	1	0.07	7	54	1	0.07
Group 5	14	7	50	1	0.07	2	0.14	1	0.07
Group 6	24	13	54	1	0.04	4	0.17	2	0.08
Group 7	34	1	0.03	0	0	0	0	0	0
Chi-square test		x2 = 46.40		x2 = 2.16
p-value		p=0.0001(HS)		p=0.99(NS)

N = Number of patients, n= Number of patients in sub group, LVH = Left ventricular hypertrophy, STD = ST depression, Tw = T wave changes, HS = Highly significant, NS = Non significant