. 2017 Jan 25;31(1):11–18. doi: 10.1016/j.sjopt.2017.01.002

Table 3.

The mean K readings and its P values.

	Preoperative Mean ± SD Min-max	3 months Mean ± SD Min-max	P¹ value	6 months Mean ± SD Min-max	P² value	12 months Mean ± SD Min-max	P³ value
K1	44.38 ± 2.07	44.66 ± 2.01^AC	<0.001^*	43.8 ± 1.98^AB	<0.001^*	43.6 ± 2.09^CB	<0.001^*
K1	(41.0–49.3)	(41.7–50.10)	<0.001^*	(40.6–49.0)	<0.001^*	(40.5–49.8)	<0.001^*
K2	46.5 ± 2.4	46.76 ± 2.4^AC	0.002^*	45.57 ± 1.97^AB	<0.001^*	45.4 ± 2.00^BC	<0.001^*
K2	(43.4–55.4)	(43.9–55.1)	0.002^*	(42.2–50.5)	<0.001^*	(42.2–50.5)	<0.001^*
K max	49.12 ± 3.7	49.3 ± 3.9^AC	0.007^*	48.12 ± 3.7^AB	<0.001^*	47.9 ± 3.7^BC	<0.001^*
K max	(44.5–59.5)	(44.5–60.0)	0.007^*	(42.6–59.4)	<0.001^*	(42.6–59.2)	<0.001^*

Paired samples t test. ABC: Similar letters indicate statistically significant differences (p < 0.05).

P1: difference between preoperative and after 3 months.

P2: difference between preoperative and 6 months.

P3: difference between preoperative and 12 months.

SD: Standard deviation; K max: maximum keratometric value.