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Table 4 Estimated mean differences in postoperative IOP in nanophthalmos based on GEE models for all variables

From: Morphological features of anterior segment: factors influencing intraocular pressure after cataract surgery in nanophthalmos

Variable Univariate GEE models Multivariate GEE models
Beta a P value Beta a P value
Age −0.076 ± 0.040 0.056 − 0.069 ± 0.018 < 0.001b
Gender NA 0.391   
Eye laterality NA 0.868   
CCT 0.021 ± 0.016 0.185   
AL −0.526 ± 0.866 0.544   
ACD 0.256 ± 1.086 0.814   
LT 2.168 ± 2.329 0.352   
Preoperative IOP 0.824 ± 0.175 < 0.001b 0.662 ± 0.102 < 0.001b
Glaucoma surgery NA 0.001b   
Extent of PAS 0.018 ± 0.004 < 0.001b 0.012 ± 0.004 0.003b
Boomerang-shaped iris NA 0.790   
Iris crypt grading 0.857 ± 1.938 0.658   
SC diameter −0.032 ± 0.041 0.437   
SC area −0.003 ± 0.001 0.004b −0.002 ± 0.001 0.001b
TM thickness −0.043 ± 0.030 0.149 0.040 ± 0.023 0.090
TM width −0.012 ± 0.019 0.524   
TM area 0.0003 ± 0.0001 0.032b   
  1. IOP =  intraocular pressure, GEE =  generalized estimating equation, NA =  not applicable, CCT =  central corneal thickness, AL =  axial length, ACD =  anterior chamber depth, LT =  lens thickness, PAS =  peripheral anterior synechiae, SC =  Schlemm’s canal, TM =  trabecular meshwork
  2. a Data represent the mean changes ± standard error in postoperative IOP anticipated for each factor. GEE analysis was used
  3. b Statistically significant (P < 0.05)