The Effect of Altitude on Intraocular Pressure in Vitrectomized Eyes with Sulfur Hexafluoride Tamponade by the Friedenwald Method: Rabbit Animal Model

Table 3

Regression lines and slopes per case in rabbits.

Case	Regression	IOP increase/100 m altitude rise mmHg (95% CI)	Significance (95% CI) Benchmark: 100% SF6
100% SF6		1.53 (0.9 to 2.2)
50% SF6		1.046 (0.5 to 1.6)	NS
100% Air		0.9707 (0.7 to 1.2)	NS
25% SF6		0.9716 (0.6 to 1.4)	NS
Pneum		0.1485 (−0.4 to 0.7)	Sig
BSS		0.0685 (−0.7 to 0.5)	Sig

Linear regression in rabbit eyes. IOP: intraocular pressure. SF₆: sulfur hexafluoride. BSS: balanced saline solution. Pneum: rabbit eye without vitrectomy and 100% SF₆. NS: not significant. Sig: significant.