Table 2. Mean values of FI of subgroups with the corresponding standard deviation, and confidence intervals.

Group	n	Mean	Standard deviation	Standard error	95% Confidence interval of the mean	Median
Tumour	7	2316.2	1174.5	443.9	1230.0–3402.5	1966.1
Nonmetastatic SLN	7	526.2	184.5	69.7	355.5–696.8	519.8
Metastatic SLN	7	2629.9	821.7	310.6	1869.9–3389.8	2590.5
Nonmetastatic ALN	5	499.9	62.8	28.1	421.9–577.9	517.7
Metastatic ALN	2	3610.9	439.2	310.6	−335.4–7557.3	3610.9