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Table 6 Summary of time to return to flight duty (RTFD)

From: Return to flight duty (RTFD) after posterior lumbar spine surgery for symptomatic lumbar disc herniation (LDH) and lumbar isthmic spondylolisthesis (LIS) in Chinese military pilots

Parameter

Value

Time to recommended RTFD

161.0 (120.0, 206.8)

 Time to recommended RTFD without retired pilot & non-LD DQ

143.0 (116.5, 196.0)

  Time to recommended RTFD without retired pilot & non-LD DQ (Isolated decompression)

130.5 (112.5, 163.0)

  Time to recommended RTFD without retired pilot & non-LD DQ (Decompression with fusion)

558.0 (159.0, 925.5)

   Time to recommended RTFD without retired pilot & non-LD DQ (Decompression with fusion/preservation of PSS)

195.0 (159.0, 376.5)

Time to RTFD without retired pilot & non-LD DQ

221.0 (182.0, 300.0)

 Time to RTFD without retired pilot & non-LD DQ (Isolated decompression)

192.0 (165.8, 230.8)

 Time to RTFD without retired pilot & non-LD DQ (Decompression with fusion)

708.0 (263.5, 1041.0)

  Time to RTFD without retired pilot & non-LD DQ (Decompression with fusion/preservation of PSS)

301.0 (263.5, 504.5)

  1. LD, lumbar diseases; DQ, disqualification; PSS, pedicle screw system. The median and inter-quartile range (IQR) present continuous variables