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. 2005 Sep 8;15(2):165–173. doi: 10.1007/s00586-005-0942-2

Table 4.

Interoberserver–intermethod reliability

  Mean of mean differences (°)
Mean difference (°) between two measurement-sets [Range of means]a 		P valueb [range] Pearson’s correlation coefficient mean [range] 95%-C.I.c (°)
Spike method O-I versus fin method O-II −0.72
Inline graphic 		Inline graphic 0.899
Inline graphic 		−2.7°/+4.1°
Fin method O-I versus spike method O-II 0.42
Inline graphic]		 Inline graphic 0.893
Inline graphic 		−3.8°/+3.0°
Spike method O-I versus fin method O-III −0.40°
Inline graphic 		Inline graphic 0.867
Inline graphic 		−3.0/+3.8
Fin method O-I versus spike method O-III 0.46
Inline graphic 		Inline graphic 0.907
Inline graphic 		−3.5°/+2.5°

O-I experienced observer 1, O-II inexperienced observer 2, O-III experienced observer 3

aThe values for each possible measurement combination is listed (e.g. O-I-first measurement with the spike method versus O-I-first measurement with the fin method, O-I-first-spike versus O-I-second-fin, O-I-second-spike versus O-I-first-fin, O-I-second-spike versus O-I-second-fin. The same was true for O-II. As O-III measured once, only two values are available)

bUnpaired t test (the values for each possible combination of data set as described in a)

c95% Confidence interval around the mean difference