Table 1.
Clinical Characteristics of Patients with Congenital Superior Oblique Palsy Compared between Patients with a Trochlear Nerve (Present Group) versus Those without a Trochlear Nerve (Absent Group).
Fig 1.
Kaplan-Meier survival plots of motor success after inferior oblique myectomy in superior oblique palsy.
The cumulative probabilities of motor success at 24 months after surgery were 86% in patients without a trochlear nerve by Kaplan-Meier analysis. In patients with a trochlear nerve, cumulative probabilities of motor success at 24 months were 92%and all cases of failure were revealed as masked bilateral SOP. There was no significant difference in the cumulative probabilities of overall success at postoperative 24 months between both groups (P = 0.138, log-rank test).
Fig 2.
Kaplan-Meier survival plots of undercorrection of hypertropia after inferior oblique myectomy in superior oblique palsy.
The cumulative probabilities of undercorrection and recurrence of hypertropia at postoperative 24 months were 21% in the absent group, contrary to 0% in the present group (P = 0.014, log-rank test).
Fig 3.
Kaplan-Meier survival plots of persistent head tilt after inferior oblique myectomy in superior oblique palsy.
The cumulative probabilities of persistent head tilt at 24 months after surgery were 20% in patients without a trochlear nerve. The patients with a trochlear nerve showed 14% at 24 months after surgery. (P = 0.486, log-rank test).
Table 2.
Cox proportional hazards model in Motor Failure and Persistent Head Tilt.