Patient Reported Outcome Measures (PROMs)

In their 2-year follow up study, Walter et al. used a visual analogue scale (VAS) for patient satisfaction and found that 95.3% responded positively (responding 8-10 on a 10-point scale), which they commented was unusual in their previous knee cohorts and was equivalent to satisfaction responses for their own hip cohorts (95.2%) at the same timepoint²⁹. In their stability study of 60 patients Jacobs et al. found that patients with SAIPH® Knees were more likely to be satisfied with their outcome than patients with non-medially stabilised knees (>7.5 VAS satisfaction: 97% SAIPH® vs 83% other; p=0.08), which became significant (p=0.048) when comparing all stable to all unstable knees in their study27. In one surgeon’s consecutive series comparing SAIPH® patients with those who had received his established device, SAIPH® patients scored mean 9.3 on the same VAS-satisfaction scale²⁸.

In their 5-year postoperative data for a cohort of 100 SAIPH® Knees, Katchky et al. found that when asked: “How would you describe the results of your operation?” (Success), 98% of patients responded that the results of their operation were ‘good’ to ‘excellent’ (Figure 6) ³¹. In their 274-patient multicentre study, Bare et al. reported an equally high degree of satisfaction: 96.4% of patients described the results of their operation as ‘good’ to ‘excellent’ (Figure 7) ³².

When asked “Overall, how are your problems now compared to before your operation?” (Satisfaction), Katchky et al. reported that 98% of patients responded with ‘much better’ (Figure 6) ³¹. Bare et al. found 97.2% of their patients said their problems were ‘better than before surgery’ with 92.6% saying ‘much better’ 2 years after their surgery (Figure 7) ³². Bare et al. reported that results were reproducible for all surgeons: median satisfaction for every surgeon’s cohort was ≥9 out of 1032. Unlike recent reports on patient satisfaction after total knee replacement^40,41,42, SAIPH® Knee cohorts do not display a 15-20% dissatisfaction rate^{27,28,29,30,32}.