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Table 3 A comparison of strict versus relaxed biometry measurements obtained using volume sweep imaging protocol

From: Testing telediagnostic obstetric ultrasound in Peru: a new horizon in expanding access to prenatal ultrasound

Variable All measurements
(n = 109)
Second trimester only (n = 68) Third trimester
only (n = 58)
Number of biometry measurements achieved (strict) 2 (0–4) 2 (0–4) 2 (0–4)
Number of biometry measurements achieved (including relaxed) 3 (0–4) 3 (0–4) 3 (0–4)
Estimated gestational age (days)
 Stricta 195 ± 49 (n = 109) 158 ± 27 (n = 60) 242 ± 23 (n = 49)
 Including relaxeda 194 ± 51 (n = 122) 155 ± 28 (n = 67) 243 ± 24 (n = 55)
p-valueb 0.37 0.44 0.58
  1. a values are mean ± standard deviation
  2. busing paired t-test