fasting blood sugar Article 1 Blood Glucose 1 Cross-Sectional Studies 1 Diabetes Mellitus, Type 2 1 Female 1 Glycated Hemoglobin A 1 Humans 1 Male 1 Middle Aged 1 Sudan 1 adult 1 antidiabetic agent 1 blood 1 calculated glycosylated haemoglobin A 1 clinical evaluation 1 coronary spasm 1 coronary spastic angina 1 correlational study 1 cross-sectional study 1 cystatin-C 1 diabetes mellitus 1 disease duration 1 female 1 glucose 1 glucose blood level 1 glycosylated hemoglobin 1 groups by age 1 hemoglobin A1c 1 hemoglobin blood level 1