Table 1a.

Details of records reviewed

Total number of ultrasounds reviewed1353
Number of ultrasounds excluded133
Number of ultrasounds included in study1220
Total number of patients with stones105
Mean age of all patients in study (SD)a65.5 (13.4)
Mean age of patients without stones65.4 (13.5)
Mean age of patients with stones66.0 (12.0)
Mean age of patients with asymptomatic stones67.8 (11.1)
Mean age of patients with symptomatic stones64.5 (12.6)
  • a All means are listed in years as mean (SD).