MCM3AP and cancer: To further assess the relationship between MCM3AP-AS1 expression levels and OS, we performed a subgroup analysis based on the following factors: the system of cancers (digestive system, urogenital system, respiratory system, or other) (Figure 3(a)), sample size (≥80 < 80 tissues) (Figure 3(b)), follow-up time (>60 or ≤60 months) (Figure 3(c)), and article quality (NOS scores ≥ 7 or <7) (Figure 3(d)).