OAI Schedule of Visits and Assessments

OAI Examination Measures

Last modified on Sep 10, 2018

Questionnaire Measures

Last modified on Oct 18, 2017

 

Baseline Subject Characteristics

  Progression Incidence Control
Women 57% 59% 61%
Age 60-79 55% 54% 25%
Non-white 30% 18% 7%
BMI > 30 50% 33%  
History of knee injury/surgery 51% 39% 0%
Frequent knee symptoms 100% 30% 0%
X-Ray OA in >1 knee, baseline clinic read 100% 39% 0%
Number of subjects 1,389 3,285 122

 

Data Completeness

Follow Up Visit Summary

Visit 12m 24m 36m 48m 60m 72m 84m 96m 108m
Clinic Visit 4,293 (90%) 4,082 (85%) 3,925 (82%) 3,831 (80%)   3,239 (68%)   3,117 (65%)  
Telephone Interview 200 (4%) 260 (5%) 349 (7%) 425 (9%) 3,935 (82%) 584 (12%) 3,787 (79%) 531 (11%) 3,204 (67%)
Did not consent to extension         724 (15%) 724 (15%) 724 (15%) 724 (15%) 724 (15%)
Contacted no data   201 (4%)   126 (3%) 39 (1%) 81 (2%) 48 (1%) 83 (2%) 88 (2%)
Withdrew 44 (1%) 97 (2%) 148 (3%) 207 (4%) NA 50 (1%) 87 (2%) 137 (3%) 332 (9%)
Unable to contact   145 (3%)   137 (3%) 13 (<1%) 6 (<1%) 12 (<1%) 13 (<1%) 31 (<1%)
Deceased 12 (0.2%) 29 (0.6%) 52 (1%) 70 (1%) 85 (2%) 112 (2%) 138 (3%) 172 (4%) 208 (4%)