Author;"Study design";"Sample size Number of Patients";Population;"Vitamin D levels in cases";"Vitamin D levels in controls";p-value
"(a) Our study";CCS;50;Male;"45.64±29.99 nmol/L";"91.93±30.55 nmol/L";<0.0001
"(b) Sanke S, et al.[4]";CCS;50;Male;"20.10±4.8 ng/mL";"29.34±5.6 ng/mL";<0.001
"(c) Tahlawy SM, et al.[26]";CCS;30;Male;"37.1±11.9 ng/mL";"44.2±9.6 ng/mL";0.01
"(d) Saraç G, et al.[27]";CCS;58;"Male and female";"12.2±8.3 ng/dL";"16.02±8.3 ng/dL";0.01
"(e) Zhao J, et al.[17]";CCS;777;Male;"50.00 nmol/L [48.90, 51.40]";"53.05 nmol/L [51.55, 54.60]";0.0005