<i>COL1A1</i> expression normalized by different combinations of reference genes in the rotator cuff tendons samples.

ap- value by paired T-test bp-value by independent T-test *p < 0.05. SD: standard deviation; CC: central cuff (injured supraspinatus tendon) samples of cases; PC: posterior superior cuff samples of cases; AC: anterior cuff samples of cases; CCC: central cuff samples of controls; ACC: anterior cuff samples of controls. COL1A1 expression normalized by different combinations of reference genes in the rotator cuff tendons samples.a组经配对t检验（paired T-test）所得的p值、b组经独立样本t检验（independent T-test）所得的p值 *p < 0.05。SD：标准差（standard deviation）；CC：病例组中央肩袖（损伤的冈上肌腱）样本；PC：病例组后上肩袖样本；AC：病例组前肩袖样本；CCC：对照组中央肩袖样本；ACC：对照组前肩袖样本。 肩袖肌腱样本中，经不同参考基因组合归一化处理的COL1A1（Ⅰ型胶原蛋白α1链）表达水平。