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Table 1 Demographic and biometric data of patients, by group

From: Intraocular lens power calculation formulas accuracy in combined phacovitrectomy: an 8-formulas comparison study

Parameter Group 1
Phacoemulsification alone
n = 100
Group 2
Combined phacovitrectomy
n = 120
p-value
Age, years 76.72 ± 10.34 (46–94) 74.35 ± 6.51 (59–89) 0.0011
Female gender, n (%) 52 (52.0) 52 (42.3) 0.2182
Axial length, mm 23.52 ± 1.13 (21.14–26.91) 23.41 ± 0.99 (21.26–26.91) 0.3201
Anterior chamber depth, mm 3.23 ± 0.43 (2.06–4.64) 3.21 ± 0.41 (2.33–4.32) 0.7623
Mean Keratometry, D 43.92 ± 1.55 (40.69–47.96) 44.14 ± 1.40 (40.28–47.27) 0.2113
Corneal Thickness, µm 538.76 ± 32.71 (472–645) 548.39 ± 33.58 (457–654) 0.6943
Lens Thickness, mm 4.39 ± 0.51 (2.56–5.44) 4.52 ± 0.45 (3.59–5.79) 0.3213
Horizontal corneal diameter, mm 11.95 ± 0.42 (10.99–12.82) 11.86 ± 0.44 (10.41–13.27) 0.7223
Implanted IOL power, D 21.39 ± 2.87 (12.0–28.0) 21.27 ± 2.69 (12.0–29.0) 0.7391
Postoperative refractive SE, D − 0.06 ± 0.55 (− 2.13 to 1.63) − 0.06 ± 0.58 (− 1.38 to 1.38) 0.8601
  1. Results are expressed as mean ± standard deviation (range)
  2. IOL intraocular lens, SE spherical equivalent, D diopters
  3. 1Mann-Whiney-U test; 2Chi-square test; 3Independent samples t-test