Table 3. Comparison of outcome using standard tables and modified numbers.

	Surgery using standard tables (n=311) Number (Percentage)	Surgery using modified numbers (n=171) Number (Percentage)	P-value
Below 6 years
Orthophoria	33/44 (75%)	24/31 (77%)	1.00
Undercorrection	1/44 (2%)	6/31 (19%)	0.02
Overcorrection	10/44 (23%)	1/31 (4%)	0.02
7–12 years
Orthophoria	90/99 (91%)	51/58 (88%)	0.59
Undercorrection	5/99 (5%)	5/58 (9%)	0.50
Overcorrection	4/99 (4%)	2/58 (3%)	1.00
Above 12 years
Orthophoria	67/162 (41%)	66/82 (80%)	<0.01
Undercorrection	95/162 (59%)	16/82 (20%)	<0.01
Overcorrection	0/162	0/82	1.00