Effect of introducing an online system on the follow-up of elbow arthroplasty

Table 1 Demographic data of all patients divided per type of prosthesis

	Total elbow prosthesis	Radiocapitellar prosthesis	Radial head prosthesis	Revision surgery	Total
Patients (n)	99	14	68	52	233
Sex
Man	22	7	19	12	60
Woman	77	7	49	40	173
Age (yr)
Mean (SD)	69 (4)	56 (7)	50 (13)	61 (13)	61 (13)

Table 2 Results before vs after introduction of the online database

	Total elbow prosthesis	Radiocapitellar prosthesis	Radial head prosthesis	Revision surgery	Total
Questionnaires sent in total
Before introduction	212	24	245	135	616
After introduction	69	8	36	30	143
Response rate (%)
Before introduction	57.90%	45.80%	40.40%	54.10%	49.80%
After introduction	89.90%	100%	83.30%	100%	91.60%
Email address known (n)	43	5	26	21	95

Table 3 Paper vs online after the introduction of the online database

	Total elbow prosthesis	Radio-capitellar prosthesis	Radial head prosthesis	Revision surgery	Total
Questionnaires sent in total
Paper	49	5	24	22	100
Online	20	3	12	8	43
Response rate
Paper	91.90%	100.00%	83.30%	100.00%	92.00%
Online	90.00%	100.00%	83.30%	100.00%	90.70%
Completeness of questionnaires
Paper	48.90%	40.00%	65.00%	59.10%	54.40%
Online	100.00%	100.00%	100.00%	100.00%	100.00%
Mean age (yr)
Paper (SD)	68 (8)	58 (8)	50 (14)	63 (10)	63 (12)
Online (SD)	68 (8)	50 (3)	50 (13)	55 (16)	59 (14)
Mean age (yr)
Responders (SD)	68 (8)	55 (7)	50 (13)	61 (13)	62 (13)
Non-responders (SD)	67 (10)	-	36 (13)	-	52 (19)