Table 10.

Distribution of HbF in school children with β-thalassemia trait

HbF (%)	Mumbai			Delhi			Total
	No.	%	Cum%	No.	%	Cum%	No.	%	Cum%
<1.0	122	80.3	80.3	88	31.0	31.0	210	48.2	48.2
1.1–1.5	21	13.8	95.1	70	24.6	55.6	91	20.9	69.1
2.1–2.5	9	5.9	100	40	14.1	69.7	49	11.2	80.3
2.1–2.5	0	0		38	13.4	83.1	38	8.7	89.0
2.6–3.0	0	0		29	10.2	93.3	29	6.6	95.6
3.1–3.5	0	0		12	4.2	97.5	12	2.8	98.4
3.6–4.0	0	0		0	0.0	97.5	0	0.0	98.4
4.1–4.5	0	0		5	1.7	99.2	5	1.2	99.6
4.6–5.0	0	0		1	0.4	99.6	1	0.2	99.8
>5.0	0	0		1	0.4	100.0	1	0.2	100.0