J Bone Joint Surg Am. 2012 Jul 18;94(14):1249-57.
Lapner PL, Sabri E, Rakhra K, McRae S, Leiter J, Bell K, Macdonald P.

In this multicenter Level 1 study, 90 patients were randomized to either single-row or double-row fixation for arthroscopic rotator repair. The authors found that at 2 years follow-up there were no differences in the two groups with respect to functional or quality of life outcomes as measured by the Western Ontario rotator cuff (WORC) index, constant score and the American Shoulder and Elbow Surgeons (ASES) score. There was also no difference in strength between the 2 groups at follow-up. However, the study found that the double-row technique correlated with higher rates of healing on MRI assessment.