Modality | Store and forward |
 | Hybrid |
 | Real time |
Setting - referral source | Home |
 | Primary care |
 | Hospital |
Setting - referral location | Metropolitan |
 | Rural |
Travel distance or travel time | Long (> = 1 hour) |
 | Short (< 1 hour) |
Patient age | Young (fetal and paediatric) |
 | Adult |
 | Elderly |
Urgency | Elective |
 | Emergency |
Purpose | Diagnosis |
 | Management (treatment, monitoring) |
Health system | Private |
 | Public |
Specialty | Cardiology |
 | Dermatology |
 | Psychiatry |
 | etc (see Table 4) |