Background: This article provides some new construction methods of partially balanced bipartite block (PBBB) designs for comparing test treatments with more than one control. 
 
Methods: Partially balanced incomplete block (PBIB) designs based on some association schemes such as group divisible association, and cyclic association are used for developing these methods of construction.&nbsp; 
 
Result: A catalogue of efficient PBBB designs is included for parameter values n1 (number of test treatments) &le;10, n2 (number of control treatments) &le;10 and r2 (replications of test treatments) and (replications of control treatments) &le;15 along with computed variances using SAS code.

Incomplete Block Designs for Comparing Test Treatments with Multiple Controls

<div>Background: Most of the biomarkers used in joint disease are articular cartilage components such as chondroitin sulphate (CS), keratan sulphate (KS), hyaluronic acid (HA), or type II collagen. Some of these biomarkers, alone or together, could have the potential to provide clinically useful indices of the effects of isolated joint injury, the progression of joint changes and/or the response to therapy. Serum concentration of HA were elevated in human patients with osteoarthritis which increase is considered a reliable biomarker reflective of cartilage damage and synovitis in these patients.&nbsp; 
 
Methods: Blood samples were collected from all the dogs and serum concentration of hyaluronic acid was determined by Canine Hyaluronic Acid Elisa kit (catalogue No.ITE070452), SIZE -96T, Reactivity: Canine, Range: 2 ng/ml -700ng/ml and sensitivity: 1.04 ng/ml, supplied by G Biosciences. 
 
Result: Serum concentration of HA were lower in dogs aged between 0 to 12 months with CHD when compared to dogs of similar age with healthy hip joints and that this significant decrease in serum HA in dogs can be considered a reliable biomarker reflective of CHD and serum HA levels can be used as an effective biomarker for osteoarthritis in dogs with CHD.</div>

Incomplete Block Designs for Comparing Test Treatments with Multiple Controls

Serum Hyaluronic Acid- An Effective Biomarker for Early Detection of Osteoarthritis in Young Dogs with Canine Hip Dysplasia