Table 2:

Descriptive Statistics: Continuous and Ordinal Variables

	Patient Group	number (number missing)	mean (standard deviation, SD)	5-Number Summary [minimum, 25th percentile, median, 75th percentile, maximum]	Compare Groups
					mean diff, (95% CI diff.), median diff	p - value
Variable					mean diff, (95% CI diff.), median diff	p - value
Continuous Variables (all independent-samples t-tests)
CDVA logMAR	All Eyes	192 (0)	0.18 (0.2)	[−0.1, 0, 0.2, 0.3, 1.6]	0.01
	Male	62 (0)	0.18 (0.19)	[−0.1, 0, 0.2, 0.3, 0.8]	(−0.05, 0.07)	0.83
	Female	130 (0)	0.18 (0.2)	[−0.1, 0, 0.2, 0.3, 1.6]	0.00
Age	All Eyes	192 (0)	71.6 (9.4)	[35, 67, 72, 77, 91]	1.2
	Male	62 (0)	72.4 (9.2)	[35, 68, 73.5, 80, 89]	(−1.7, 4.1)	0.418
	Female	130 (0)	71.2 (9.5)	[35, 66, 72, 76, 91]	1.5
CD 0–2 mm	All Eyes	192 (0)	25.5 (6.1)	[17.3, 21.2, 23.9, 28, 48]	−0.4
	Male	62 (0)	25.2 (6.8)	[17.3, 20.3, 22.6, 28.1, 48]	(−2.4, 1.6)	0.675
	Female	130 (0)	25.6 (5.7)	[17.7, 21.5, 24.2, 27.9, 45.6]	−1.6
CD 2–6 mm	All Eyes	192 (0)	23.5 (4.9)	[15.9, 19.7, 22.6, 26.4, 41.5]	−0.1
	Male	62 (0)	23.4 (5.4)	[15.9, 19.3, 21.8, 26.7, 41.5]	(−1.6, 1.4)	0.872
	Female	130 (0)	23.5 (4.6)	[15.9, 19.8, 22.7, 26.3, 37.8]	−0.9
CD 6–10 mm	All Eyes	192 (0)	34 (8.9)	[16.6, 27.3, 32.5, 40.9, 56.9]	0.9
	Male	62 (0)	34.6 (8.4)	[17.1, 28.5, 33.1, 42.1, 55.6]	(−1.8, 3.6)	0.51
	Female	130 (0)	33.7 (9.2)	[16.6, 27, 32.4, 40.5, 56.9]	0.6
CD 10–12 mm	All Eyes	192 (0)	37.4 (9.4)	[16.5, 30.5, 36.6, 44.2, 65]	−0.6
	Male	62 (0)	37 (9.6)	[22.7, 30.7, 34.8, 43.8, 60.7]	(−3.5, 2.3)	0.687
	Female	130 (0)	37.6 (9.4)	[16.5, 30.5, 37.7, 44.6, 65]	−3.0
CCT	All Eyes	175 (17)	597.3 (48.1)	[486, 563, 595, 628, 770]	1.7
	Male	56 (6)	598.4 (54.2)	[486, 557, 592.5, 641.5, 742]	(−13.8, 17.1)	0.83
	Female	119 (11)	596.7 (45.2)	[514, 566, 595, 618, 770]	−2.5
Refractive Error SE	All Eyes	192 (0)	0.14 (2.13)	[−7.75, −0.75, 0, 1.5, 5.25]	0.24
	Male	62 (0)	0.31 (2.07)	[−6, −1, 0.2, 1.75, 4.5]	(−0.41, 0.89)	0.469
	Female	130 (0)	0.07 (2.16)	[−7.75, −0.75, 0, 1.5, 5.25]	0.20
Ordinal Variables (means and SD do not apply to ordinal variables) All Mann-Whitney Wilcoxon 2-sample tests
Guttae	All Eyes	189 (3)		[0.5, 1.5, 2, 3, 4]
	Male	61 (1)		[0.5, 1.5, 2, 3, 4]	0.0	0.826
	Female	128 (2)		[0.5, 1.5, 2, 3, 4]
Cataract Grade	All Eyes	192 (0)		[0, 0, 2, 2, 4]
	Male	62 (0)		[0, 0, 2, 2, 4]	0.5	0.261
	Female	130 (0)		[0, 0, 1.5, 2, 3]
Corneal Edema	All Eyes	192 (0)		[0, 0, 0, 0, 3]
	Male	62 (0)		[0, 0, 0, 0.5, 3]	0.0	0.025 ^*
	Female	130 (0)		[0, 0, 0, 0, 2.5]

p < 0.05,

^**

p < 0.01,

^***

p < 0.001.

CCD = central corneal densitometry; CCT = central corneal thickness; CDVA = corrected distance visual acuity; CI = confidence interval; Diff. = difference; LogMAR = logarithm of the minimum angle of resolution; mm = millimeters;