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Table 3 Range, mean, and SD of SII in the normal, ankylosing spondylitis, and metastatic cases

From: Quantitative scintigraphy in discriminating sacroiliac joint physiological and pathological uptake

Group Range of SII Mean ± SD P
Group I P1 (paired t test) = 0.92
P2 (independent t test) = <0.001**
P3 (independent t test) = <0.001**
P4 (independent t test) = 0.49
 RT. SII (n = 40) 0.91–1.13 1.04 ± 0.09
 LT. SII (n = 40) 0.9–1.14 1.05 ± 0.09
 Overall SII (n = 80) 0.9–1.14 1.04 ± 0.09
Group II (n = 35) 1.2–1.5 1.37 ± 0.1
Group III (n = 36) 1.2-–1.6 1.39 ± 0.14
  1. Non-significant (P > 0.05) ** Highly significant (P<0.01)
  2. P1, RT vs. LT in group I; P2, group I vs. group II; P3, group I vs. group III; P4, group II vs. group III