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. Author manuscript; available in PMC: 2022 Jul 22.
Published in final edited form as: J Burn Care Res. 2017 Jan-Feb;38(1):e192–e199. doi: 10.1097/BCR.0000000000000341

Table 7.

Negative binomial regression analysis of predictors of the number of contractures

Variable IRR SE t P > |t| 95% Confidence Interval
Age 1.261 0.062 4.71 <.001 1.145–1.389
Length of stay 1.002 0.001 2.24 .025 1.000–1.003
ICU days 1.017 0.004 4.40 <.001 1.009–1.025
Amputation 1.512 0.189 3.31 .001 1.182–1.933
TBSA burn 1.050 0.019 2.59 .010 1.012–1.088
TBSA graft 1.014 0.004 3.29 .001 1.006–1.023

ICU, intensive care unit; IRR, inter-rater reliability.