Gas* (n=40) | Silicone oil* (n=40) | P value† | ||

Intraocular pressure (mm Hg) | 11.22±4.67 | 11.05±4.25 | 0.952 | |

Best corrected visual acuity (logMAR) | 0.966±0.738 | 1.270±0.945 | 0.177 | |

Best-corrected visual acuity<0.8 logMAR units | + | 17 (42.50%) | 14 (35.00%) | 0.646 |

Axial length (mm) | 26.00±2.64 | 26.68±3.04 | 0.489 | |

Spherical equivalent (diopter) | −2.73±5.35 | −3.05±5.17 | 0.979 | |

Posterior vitreous detachment | + | 32 (80.0%) | 32 (80.0%) | 1.000 |

Complex retinal detachment | + | 31 (77.5%) | 28 (70.0%) | 1.000 |

Giant tear | + | 8 (20.0%) | 10 (25.0%) | 0.789 |

Macula detachment | + | 33 (82.5%) | 34 (85.0%) | 1.000 |

Choroidal detachment | + | 6 (15.0%) | 7 (17.50%) | 1.000 |

Area of retinal detachment | One quadrant | 8 (20.0%) | 3 (7.5%) | 0.424 |

Two quadrants | 16 (40.0%) | 17 (42.5%) | ||

Three quadrants | 6 (15.0%) | 9 (22.5%) | ||

Four quadrants | 10 (25.0%) | 11 (27.5%) | ||

Stage of proliferative vitreoretinopathy | N/A | 17 (42.5%) | 22 (55.0%) | 0.183 |

B | 10 (25.0%) | 12 (30.0%) | ||

C | 13 (32.5%) | 6 (15.0%) |

*If the variables are continuous, we present the means±SD deviation. And if those are categorical, we present the number and the proportion.

†P values of continuous variables are calculated by Mann-Whitney U test and those of categorical variables are calculated by χ

^{2}test if the minimum number is >5 and Fisher’s exact test if the minimum number is ≤5. We determine that if p values are <0.05, the values are statistically significant.