Gas^{*}
(n=2042) | Silicone oil^{*}
(n=55) | P value^{§}
| ||

Gender | Male | 1376 (67.38%) | 40 (72.73%) | <0.001 |

Age (years) | 59.69±11.61 | 59.04±17.65 | 0.373 | |

History type | None | 1608 (78.75%) | 36 (65.45%) | 0.017 |

Vitrectomy excluding retinal detachment surgery | 18 (0.88%) | 2 (3.64%) | ||

Intraocular surgery excluding vitrectomy | 373 (18.27%) | 17 (30.91%) | ||

Photocoagulation for retinal break | 43 (2.11%) | 0 (0.00%) | ||

RRD type | Related to posterior vitreous detachment | 1699 (83.20%) | 30 (54.55%) | <0.001 |

Related to atrophic hole | 143 (7.00%) | 4 (7.27%) | ||

Related to atopic dermatitis | 30 (1.47%) | 5 (9.09%) | ||

Retinal detachment with macular hole related to myopia | 52 (2.55%) | 5 (9.09%) | ||

Retinal detachment with macular hole not related to myopia | 7 (0.34%) | 0 (0.00%) | ||

Related to retinal break at or near vitreous base | 7 (0.34%) | 0 (0.00%) | ||

Related to intraocular surgery | 57 (0.28%) | 3 (5.45%) | ||

Hereditary | 6 (0.29%) | 1 (1.82%) | ||

Traumatic | 41 (2.01%) | 7 (12.73%) | ||

Lens status | Phakia | 406 (19.88%) | 15 (27.27%) | 0.282 |

Aphakia | 0 (0.00%) | 0 (0.00%) | ||

Pseudophakia | 1636 (80.12%) | 40 (72.73%) | ||

Onset to surgery (days) | 12.60±34.76 | 34.05±70.91 | 0.017 | |

Type of surgery | With scleral buckling | 92 (4.51%) | 20 (36.36%) | 0.008 |

Combined cataract surgery | + | 1389 (68.02%) | 29 (52.72%) | 0.025 |

^{*}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 less or equal to 5. We determine that if p values are <0.05, the values are statistically significant. |

RRD, rhegmatogenous retinal detachment.