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. 2016 Jun 21;6(6):e011277. doi: 10.1136/bmjopen-2016-011277

Table 2.

Percentages and CIs of main categories of root causes for all units and per unit type

Root cause type (main category) Emergency medicine
N=845
Surgery
N=1250
Internal medicine
N=920
Total
N=3015
Human*†‡ 60.2 (56.9 to 63.7) 72.1 (69.7 to 74.6) 76.7 (74.7 to 79.4) 70.2 (68.6 to 71.8)
Organisational†‡ 25.0 (21.7 to 28.4) 16.1 (13.7 to 18.6) 11.8 (9.2 to 14.5) 17.3 (15.7 to 18.9)
Technical†‡ 10.8 (7.5 to 14.2) 5.7 (3.3 to 8.2) 5.1 (2.5 to 7.7) 6.9 (5.3 to 8.6)
Patient related/other*† 4.0 (0.7 to 7.4) 6.2 (3.8 to 8.6) 6.3 (3.7 to 8.9) 5.6 (4.0 to 7.3)
Total 100 100 100 100

*Significant difference between emergency medicine and surgery; p<0.05.

†Significant difference between emergency medicine and internal medicine; p<0.05.

‡Significant difference between surgery and internal medicine; p<0.05.