Quality of primary total knee arthroplasty operative reports in a tertiary teaching hospital

Table 4 Patient and documenter-related factors associated with documentation quartiles of mandatory items, n (%)

Factors	Q1	Q2	Q3	Q4	P value
Sex					0.152
Female	13 (86.7)	13 (68.4)	12 (80.0)	4 (44.4)
Male	2 (13.3)	6 (31.6)	3 (20.0)	5 (55.6)
Age	63.3 (10.2)	65.7 (8.9)	58.9 (10.1)	64.4 (5.6)	0.208
Body mass index	32.0 (30.7-33.8)	33.2 (27.3-39.0)	33.3 (29.6-38.7)	31.1 (24.1-35.9)	0.542
Diabetes					0.142
No	13 (86.7)	16 (84.2)	15 (100)	6 (66.7)
Yes	2 (13.3)	3 (15.8)	0 (0)	3 (33.3)
Sequence of the case					0.954
First	9 (60.0)	13 (68.4)	9 (60.0)	6 (66.7)
Second	6 (40.0)	6 (31.6)	5 (33.3)	3 (33.3)
Third	0 (0.00)	0 (0.00)	1 (6.7)	0 (0.00)
Operation duration in minutes	175 (32.7)	202 (43.9)	147 (36.8)	180 (37.8)	0.002
Presence of complication					0.353
LCL rupture	0 (0)	1 (5.3)	0 (0)	0 (0)
MCL avulsion	1 (6.7)	0 (0)	0 (0)	0 (0)
Medial condyle fracture	0 (0)	0 (0)	0 (0)	1 (11.1)
Length of hospital stay in days	4.00 (3.00, 4.00)	4.00 (3.00, 4.00)	3.00 (3.00, 4.00)	4.00 (3.00, 5.00)	0.974
Time to documentation in hours	0.40 (0.15-5.21)	0.72 (0.12-4.38)	5.53 (0.54-17.8)	3.18 (0.07-5.08)	0.167
Training level of documenter					0.153
Consultant	0 (0)	2 (10.5)	0 (0)	1 (11.1)
R1	1 (6.7)	0 (0)	1 (6.7)	2 (22.2)
R2	3 (20.0)	2 (10.5)	1 (6.7)	2 (22.2)
R3	1 (6.7)	6 (31.6)	2 (13.3)	2 (22.2)
R4	10 (66.7)	8 (42.1)	11 (73.3)	2 (22.2)
Specialist	0 (0)	1 (5.3)	0 (0)	0 (0)
Grouped training level of the documenter					0.117
Junior resident	4 (26.7)	2 (10.5)	2 (13.3)	4 (44.4)
Senior resident	11 (73.3)	14 (73.7)	13 (86.7)	4 (44.4)
Board certified	0 (0)	3 (15.8)	0 (0)	1 (11.1)

Data were summarized using counts and percentages for categorical variables and median (interquartile range) for continuous variables. Completeness of documentation for all items (mandatory + optional) was divided into quartiles. Analysis was performed using the Kruskal-Wallis test for continuous variables when comparing all quartiles and the Mann-Whitney U test when comparing Q1 to Q4. χ²-test for independence was used to compare categorical variables. LCL: Lateral collateral ligament; MCL: Medial collateral ligament; Q: Quartile; R1: First year resident; R2: Second year resident; R3: Third year resident; R4: Fourth year resident.