It is also clear from Figure 3, based on histology, that MMP-7 protein expression in adenocarcinoma patients was significantly higher than squamous cell carcinoma patients, in patients under age 60 (OR = 1.59, 95% CI = 1.05 to 2.40, P = 0.028), but this difference was not statistically significant in patients over 60 years age (OR = 1.14, 95% CI = 0.43 to 3.07, P = 0.79). Here, MMP7 is linked to squamous cell carcinoma.