Table 1

Clinical details of the patients

Technician
only
Medically
supervised
p value
Number of patients250225
Male/female (%)56/4452/48
Mean (SD) age (years)56 (10)56 (10)
Mean (SD) work load (mets)7.2 (3.5)8.4 (3.6)<0.005
Indications for termination
Maximum heart rate60 (24%)56 (25%)NS
Shortness of breath42 (17%)45 (20%)NS
Chest pain25 (10%)12 (5%)0.06
ST depression >0.2 mV41 (16%)24 (11%)0.07
Blood pressure changes* 18 (7%)2 (<1%)<0.005
Non-specific symptoms 64 (25%)86 (38%)<0.005
  • * Hypertension, hypotension or inability to obtain a blood pressure recording; fatigue or musculoskeletal pain.

  • Mets, metabolic equivalents of oxygen consumption.