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. 2008 Jul 25;25(8):486–491. doi: 10.1136/emj.2007.052142

Table 2. Frequency of diagnostic accuracy and values in patients in the ultrasound (US) and no ultrasound (control) groups.

US, n (%)(n = 382) No US, n (%)(n = 380) Difference(%) p Value
Correct diagnosis 247 (64.7) 216 (56.8) 7.9 0.027
Intention-to-treat (ITT) analyses US (n = 400) No US (n = 399)
    All excluded incorrect 247 (61.8) 216 (54.1) 7.7 0.029
    All excluded correct 265 (66.3) 235 (58.9) 8.4 0.032
    US correct, not US incorrect 265 (66.3) 216 (54.1) 12.2 <0.001
    US incorrect, not US correct 247 (61.8) 235 (58.9) 2.9 0.410