DDR1 and neoplasm: DDR1 expression was also significantly greater in tumor samples from patients over 65 years of age (over 65 years: 7.14 ± 0.917 vs. under 65 years: 6.94 ± 1.03, P < 0.05) and females (female: 6.89 ± 0.95 vs. Male: 7.18 ± 0.963, P < 0.05) compared to the corresponding reference groups (Figures 2B, C).