Fig. 3

The scatter plots visualizing the association between serum 25(OH)D levels and functional outcome after ischemic stroke displays five lines, each representing different MR methods: inverse-variance weighted, MR—Egger, and weighted median, simple mode and weight mode. Serum 25(OH)D levels and mRS (0–1) vs. mRS (2–6) at 3 months without adjust for stroke severity (A) and adjust for stroke severity (D); Serum 25(OH)D levels and mRS (0–2) vs. mRS (3–6) at 3 months without adjust for stroke severity (B) and adjust for stroke severity (E); Serum 25(OH)D levels and mRS at 3 months without adjust for stroke severity (C) and adjust for stroke severity (F)