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. Author manuscript; available in PMC: 2019 May 7.
Published in final edited form as: Am J Sports Med. 2013 Mar 4;41(4):769–778. doi: 10.1177/0363546513477838

TABLE 1.

JSW Change Over Time and Side-to-Side Difference (mm) in Control Patientsa

Mean ± SD Range 95% CI Percentage of Control Knees Outside 95% CI
Difference from baseline
 Medial compartment  0.01 ± 0.25 –0.59 to 0.65 ±0.49 5
 Lateral compartment −0.03 ± 0.34 −1.13 to 0.85 ±0.66 8
Difference between knees
 Medial compartment  0.01 ± 0.42 −1.12 to 1.11 ±0.82b 5
 Lateral compartment  0.02 ± 0.47 −1.41 to 0.88 ±0.92b 2
a

Joint space width (JSW) measurements in the control group did not vary significantly over time (all P > .25).

b

These 95% CI values were used to establish a “normal” JSW range; anterior cruciate ligament−reconstructed patients falling outside these limits were considered as significantly different from the normal range.