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Table 2 Intermediate-Term and Long-Term Outcomes of IntraarticularInjection of the Knee

From: The highly accurate anteriolateral portal for injecting the knee

  Lateral Midpatellar Portal Modified Anteriolateral Portal    
Number of Subjects 40 43 Percent Difference 95% Confidence Interval P Value
Pain at Outcome (2 weeks) (VAS) 2.6 ± 2.8 cm 1.7 ± 2.3 cm -35% -78% to +9% 0.11
Reduction in Pain from Baseline (VAS) 4.4 ± 3.4 cm 5.5 ± 3.1 cm +25% -7% to +57% 0.13
Responders (VAS < 2 cm) 45% (18/40) 56% (24/43) +24 -23% to +68% 0.33
Non-Responders (VAS ≥ 2 cm) 55% (22/40) 44% (19/43) -20% -56% to +19% 0.33
Pain at Outcome (6 months) (VAS) 4.9 ± 3.1 cm 4.8 ± 3.2 cm -2% -30% to +26% 0.89
Duration of Therapeutic Effect 3.9 ± 2.4 months 4.1 ± 2.2 months +5% -21% to +31% 0.69
Time to Next Procedure (reinjection or referral to surgery) 7.3 ± 3.3 months 7.7 ± 3.7 months +6% -16% to +27% 0.71