Figure 1: Percentage of patients in both groups (pen users versus syringe users) with their HbA₁c levels.

Patients are divided into four groups. Group 1 with optimal glycemic control (6.0–7.4%) (42–56 mmol/mol), Group 2 with suboptimal control (7.5–8.4%) (57–68 mmol/mol), Group 3 with poor control (8.5–9.9%) (69–85mmol/mol) and Group 4 with very poor control (≥10%) (≥86 mmol/mol) (p<0.007).