Table 4

Visual acuity outcomes in relation to various perioperative blood pressure parameters

Visual acuity 20/200 or worse at POM63 snellen lines of improvement at POM6Change in logMAR at POM6 from baseline
N (total)n (%)Significance
(p value)
n (%*)Significance
(p value)
Mean±SD
(Snellen)
Significance
(p value)
SBP ≥180 mm Hgy3523 (65.7)0.11614 (40.0)0.044−0.13±0.54 (20/27)0.018
n3617 (47.2)23 (63.9)−0.53±0.81 (20/68)
Sustained SBP ≥180 mm Hgy2219 (86.4)0.0069 (40.9)0.205−0.17±0.60 (20/30)0.205
n4921 (42.9)28 (57.1)−0.41±0.75 (20/51)
MAP ≥120 mm Hgy3526 (74.3)0.00317 (48.6)0.556−0.11±0.51 (20/26)0.003
n3614 (38.9)20 (55.6)−0.61±0.83 (20/81)
MAP ≤65 mm Hgy145 (35.7)0.825 (35.7)0.170−0.21±0.88 (20/32)0.458
n5735 (61.4)32 (68.1)−0.36±0.67 (20/46)
Use of antihypertensivesy128 (66.7)0.4297 (58.3)0.636−0.25±0.59 (20/36)0.672
n5932 (54.2)30 (50.8)−0.35±0.74 (20/45)
Use of vasopressorsy135 (38.5)0.1505 (38.5)0.276−0.13±0.88 (20/27)0.263
n5835 (60.3)32 (55.2)−0.38±0.67 (20/48)
  • Notes: χ2 p values reported for visual acuity 20/200 or worse and presence of three or greater Snellen lines of improvement. Independent t-test p value reported for change in logMAR at POM6 from baseline. Coefficients with p<0.05 are highlighted with darker border and cell shading.

  • *Per cent values reported as fraction of n out of N (total) for each parameter subgroup at POM6. Negative value of change in logMAR correlates with indicates improved vision.

  • MAP, mean arterial pressure; POM6, postoperative month 6; SBP, systolic blood pressure.