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. Author manuscript; available in PMC: 2012 Dec 17.
Published in final edited form as: Spine (Phila Pa 1976). 2009 Dec 1;34(25):2797–2802. doi: 10.1097/BRS.0b013e3181a9e640

Table 2.

Personal and Health Demographics for the 1-Year Post FRP Cohort

Variable Levels N Pct χ 2 df p <
Age Groups 18–35 18 20.9 31.14 2 .0001
36–50 53 61.6
51–62 15 17.4
Female 43 50.0 0 1 -
Gender Male 43 50.0
No 76 89.4 52.8 1 .0001
Surgery Following FRP Yes 1 6 7.1
Yes 2 2 2.4
Yes 3 1 1.2
Missing* 1
Medical Visits since FRP No 24 27.9 12.37 4 .015
Yes (1–5) 26 30.2
Yes (6–10) 12 13.9
Yes (11–20) 10 11.6
Yes (21+) 14 16.3
New Health Problems since FRP Yes 20 23.8 23.05 1 .0001
No 64 76.2
Missing* 2
*

missing not including in the computation of the chi-square statistic reported