Table 3

Inter-reviewer reliability

Error category
and global quality
All reviews
(n=4763)
Errors per reviewRepeat reviews
(n=1584 = 2 × 792 reviews in total)
ErrorsMeanSDMax.ErrorsIndividual-level reliability*Trust-level reliability†
Assessment9030.190.58122720.0030.138
Treatment8240.170.54102650.1310.883
Communication4420.090.44141400.0580.753
Medication3800.080.3481290.0720.794
Monitoring1380.030.19447
Resuscitation380.010.10212
Infection260.010.08211
Invasive250.010.0825
Other750.020.13225
All errors19090.400.92156060.0260.568
Global QoC0.1050.854
  • *Omitting categories with fewer than 50 errors reported among the repeat reviews.

  • †Computed from the Spearman-Brown formula with 50 case notes per trust.

  • QoC, Quality of Care.