Page 154 - The value of total hip and knee arthroplasties for patients

Chapter 8
Results
In the larger study, 428 THA and 417 TKA patients were included of whom 343 THA (80 %) and 322 TKA (77 %) completed the postoperative questionnaire. Of these, 131 THA patients (38 %) and 126 of TKA patients (39 %) were under 65 years. Figure 1 describes the flow of the patients included in the present analysis. Information regarding preoperative work status of 69 THA patients (53 %) and 50 TKA patients (40 %) was incomplete or inconclusive; these 119 patients were approached for additional telephone interviews. Fifteen patients (13 %) could not be reached and were therefore excluded for the present analyses.This resulted in 122 THA patients (93 %) and 120 TKA patients (95 %) who were under 65 years
and provided complete information on their work status preoperatively.
Fig 1. Flow Diagram of patients participating in a cohort study on
outcomes of total hip and knee arthroplasty
Total Hip replacements: Age <65 years and one year follow up N=131
Total Knee Replacements: Age <65 years and one year follow up N=126
Incomplete preoperative work status information N=69
Complete preoperative work status information N=62
Complete preoperative work status information N=76
Incomplete preoperative work status information N=50
No response N=9
No response N=6
Provided telephone interviews N=60
Provided telephone interviews N=44
Age <65 years + complete pre- and postoperative workstatus information N=122
Age <65 years + complete pre- and postoperative workstatus information N=120
Not working
Disabled N=10 Unemployed N=14 Volunteer work N=10 Retired N=16
Not working
Disabled N=14 Unemployed N=13 Volunteer work N=13 Retired N=10
Age <65 years + working at baseline N=71
Age <65 years + working at baseline N=64
Fig 1.Flow Diagram of patients participating in a cohort study on outcomes of total hip and knee arthroplasty
152