High rate of unexpected positive cultures in presumed aseptic revision of stiff shoulders after proximal humerus osteosynthesis

Table 3 The demographics and clinical characteristics for the group 1 (patients with growth of the same microorganism in at least two samples) and group 2 (patients with only one positive culture or negative culture results)

Variable	Group 1, n = 13	Group 2, n = 49	P-value
Age at revision (yrs)^a	55.8 ± 12.8	62.7 ± 14.7	0.12
Shoulder stiffness^{b, c}	11/12 (92)	23/35 (66)	0.14
Serum CRP level (mg/l)^a	5.2 ± 5.3	5.4 ± 8	0.95
Time from index surgery until revision (months)^a	20.1 ± 22.9	15.2 ± 20.2	0.5

^aThe values are given as the mean and the standard deviation. ^bThe values are given as the number with the percentage of the group in parentheses
^aIncluding only patients with an interval of ≥6 months between the index osteosynthesis and revision surgery

ISSN: 1471-2474