Table 2. With-the-rule and against-the-rule subgroups astigmatic vectoral analyses over 12mo.

Vectoral analyses parameters	WTR			ATR			WTR vs ATR, P (95%CI)
	1mo (n=35)	6mo (n=35)	12mo (n=34)	1mo (n=15)	6mo (n=15)	12mo (n=15)	1mo	6mo	12mo
TIA
Arithmetic (D)		1.17±0.20			1.09±0.18			0.19 (-0.04, 0.20)
Summated vector mean		1.13 Ax 179			1.01 Ax 99			-
SIA
Arithmetic	0.53±0.33	0.54±0.39	0.58±0.51	0.90 ±0.47	1.01±0.71	0.96±0.80	0.003 (-0.60, -0.14)	0.004 (-0.78, -0.16)	0.05 (-0.76, 0.001)
Summated vector mean	0.27 Ax 2	0.34 Ax 3	0.36 Ax 1	0.55 Ax 99	0.79 Ax 100	0.70 Ax 101
Correction index
Geometric	0.37±0.30	0.34±0.34	0.34±0.48	0.74±0.39	0.74±0.70	0.63±0.78	0.001 (-0.57, 0.17)	0.01 (-0.69, -0.11)	0.12 (-0.66, 0.08)
Difference vector
Arithmetic (D)	0.97±0.42	0.93±0.31	0.98±0.33	0.72±0.38	0.76±0.42	0.85±0.48	0.05 (-0.004, 0.50)	0.12 (-0.05, 0.39)	0.28 (-0.11, 0.37)
Summated vector mean	0.86 Ax 178	0.79 Ax 177	0.77 Ax 179	0.46 Ax 100	0.22 Ax 97	0.31 Ax 96
Index of Success
Geometric	0.73±0.31	0.76±0.23	0.80±0.25	0.57±0.35	0.60±0.39	0.64±0.44	0.11 (-0.04, 0.36)	0.08 (-0.02, 0.34)	0.11 (-0.04, 0.36)
Angle of error (degree)
Arithmetic	-0.61±37.58	-4.50±35.04	1.60±32.65	-1.32±25.84	-0.32±16.29	-4.12±28.96	0.95 (-20.74, 22.16)	0.66 (-23.28, 14.92)	0.56 (-13.98, 25.42)
Absolute	28.48±24.03	27.56±21.60	25.95±19.35	19.23±16.54	11.89±10.67	19.46±21.24	0.18 (-4.47, 22.97)	0.01 (3.84, 27.50)	0.30 (-5.94, 18.92)

All measurements were based on corneal astigmatism only. SD: Standard deviation; TIA: Target induced astigmatism; SIA: Surgically induced astigmatism; CI: Confidence interval; WTR: With-the-rule; ATR: Against-the-rule.

mean±SD