(b) National Tonsil Surgery Register, Sweden, 2014
Surgery
Late posttonsillectomy hemorrhage (PTH)
Return to operating theater for late PTH
PTH
No PTH
OR
95% CI
Return
No return
OR
95% CI
%
%
Cold steel dissection & cold hemostasis
636
3.3
21
615
1
1.1
7
629
1
Cold steel dissection & hot hemostasis
6.406
8.8
566
5.840
2.8383
1.8217–4.4222
<0.0001
2.7
171
6.235
2.4644
1.1522–5.2709
0.0201
Bipolar diathermy scissors
1.314
13.4
176
1.138
4.5292
2.8506–7.1963
<0.0001
3.2
42
1.272
2.967
1.3254–6.6419
0.0082
Coblation
902
9.9
89
813
3.2059
1.9701–5.2169
<0.0001
2.4
22
880
2.2464
0.9538–5.2910
0.0641
Ultracision
259
16.2
42
217
5.6682
3.2827–9.7873
<0.0001
3.9
10
249
3.6087
1.3585–9.5863
0.01
Total
9.517
9.4
894
8.623
2.6
252
9.265
Breakdown according to surgery among all 33,921 patients who underwent tonsillectomy in the RCS Tonsillectomy Audit, UK, 2005. Breakdown according to surgery among the 9,603 responders to the 30-day questionnaire (out of 15,734 patients who underwent tonsillectomy) in the National Tonsil Surgery Register, Sweden, 2014. RCS: Royal College of Surgeons; OR: odds ratio; CI: confidence interval; statistic; odds ratios were calculated with MedCalc online: https://www.medcalc.org/calc/odds_ratio.php. Given some inconsistencies in the Swedish paper, the following assumptions were made: () the figures for the number of patients who answered the 30-day questionnaire in each of the individual surgery-type groups were correct; () the figures for the “yes outcomes” (“yes PTH” and “yes RTT”) were correct; and () the figures for the “no outcomes” (“no PTH” and “no RTT”) consisted in the difference between the numbers of those who answered the 30-day questionnaire and those for the “yes answers.”