Table, Supplemental Digital Content 1. Preoperative sociodemographic, preoperative Patient-Reported Outcome Measures (PROMS) and psychological characteristics for patients with and
without a response on the Numeric Pain Rating Scale 24 hours postoperatively. Significant testing was performed using independent samples t-tests and chi-square tests. Mean ± SD values are displayed. *p<0.05 when testing differences between responders and non-responders.
Sociodemographic characteristics
Variable Non-responders (n=103) Responders (n=215) p-value
Age 60.6 ± 8.1 60.4 ± 7.6 0.901
Female sex, % 76.7% 80.9% 0.377
Symptom duration in months 39 ± 38.6 37.1 ± 37 0.687
Dominant side treated, %*
- No
- Yes
- Ambidexter
46.6%
51.5%
1.9%
51.9%
43.5%
4.6%
0.262
Workload, % - Unemployed - Light physical labor - Moderate physical labor - Heavy physical labor
51.5%
17.5%
24.3%
6.8%
43%
17.8%
22%
17.3%
0.080
Second opinion, % 5.8% 7.4% 0.814
Type of surgery, %:
- LRTI: Weilby – APL - LRTI: Weilby – FCR - LRTI: Burton/Pellegrini FCR - Other
6.8%
61.2%
23.3%
8.7%
10.7%
58.1%
23.3%
7.9%
0.731
Preoperative PROMS
Variable Non-responders Responders p-value
VAS Pain past week 66.3 ± 17.6 67 ± 17.1 0.743
VAS Rest 53.2 ± 22.2 52 ± 22.3 0.655
VAS Physical load 75.2 ± 18.4 75.3 ± 16.7 0.953
VAS Satisfaction with hand 24.9 ± 22.2 25.6 ± 19.3 0.783
MHQ Hand Function affected 54.3 ± 20.5 53.3 ± 17.8 0.642
MHQ ADL affected 48.8 ± 25 49.5 ± 23.2 0.793
MHQ Work 45.6 ± 28.2 50.2 ± 24.9 0.145
MHQ Pain 63.3 ± 15.5 63.9 ± 13.8 0.715
MHQ Aesthetics affected 40 ± 26.8 41.4 ± 26.3 0.651
MHQ Satisfaction affected 33.5 ± 22.1 33.8 ± 17.3 0.91
MHQ Total affected 43.2 ± 14.7 44.1 ± 12.7 0.578
EQ5D mobility 1.5* ± 0.8 1.3* ± 0.6 0.008
EQ5D selfcare 1.5 ± 0.7 1.4 ± 0.6 0.476
EQ5D ADL 2.6 ± 1 2.5 ± 0.9 0.271
EQ5D pain/discomfort 3.2 ± 0.7 3.2 ± 0.7 0.425
EQ5D Anxiety/depression 1.4 ± 0.7 1.4 ± 0.7 0.707
EQ5D index score 0.7 ± 0.2 0.7 ± 0.1 0.275
EQ5D general health VAS 72.9 ± 19.9 76.5 ± 18.3 0.108
Psychological characteristics
Variable Non-responders Responders p-value
CEQ credibility 23.4 ± 3 23.7 ± 2.6 0.319
CEQ Expectancy 21.8 ± 2.8 21.9 ± 2.8 0.64
IPQ consequences: How much does your illness affect your life? (10 = severely affects my life) 7.6 ± 1.8 7.3 ± 1.8 0.191
IPQ timeline: How long do you think your illness will continue? (10 = forever) 6.9 ± 2.6 6.5 ± 2.4 0.107
IPQ personal control: How much control do you feel you have over your illness? (0 = absolutely no control) 4.6 ± 2.6 4.4 ± 2.4 0.39 IPQ treatment control: How much do you think your treatment can help your illness? (10 = extremely helpful) 8.2 ± 1.4 8.3 ± 1.1 0.434
IPQ identity: How much do you experience symptoms from your illness? (10 = many severe symptoms) 6.9 ± 2.6 7 ± 2.3 0.835
IPQ concern: How concerned are you about your illness? (10 = extremely concerned) 6.4 ± 2.9 6.5 ± 2.5 0.786
IPQ coherence: How well do you feel you understand your illness? (10 = understand very clearly) 8.3 ± 2.2 8.5 ± 1.8 0.588
IPQ emotional representation: How much does your illness affect you emotionally? e.g. does it make you angry. scared. upset or depressed? (10 = extremely affected emotionally)
5.1 ± 3 5.1 ± 2.9 0.983
IPQ total 42.1 ± 10.1 41.3 ± 9.1 0.456
PCS 14.5 ± 11.3 13.7 ± 9.5 0.498
PHQ subscale anxiety 0.9 ± 1.3 0.8 ± 1.3 0.645
PHQ subscale depression 0.7 ± 1.3 0.6 ± 1.1 0.346
PHQ total score 1.4 ± 2 1.3 ± 2.1 0.65
Abbreviations: LRTI = Ligament Reconstruction Tendon Interposition, APL = Abductor Pollicis Longus, FCR = Flexor Carpi Radialis, PROMS = Patient Reported Outcome Measures, VAS = Visual Analogue Scale, MHQ = Michigan Hand outcomes Questionnaire, CEQ = Credibility/Expectancy Questionnaire, IPQ = brief Illness Perception Questionnaire, PCS = Pain Catastrophizing Scale, PHQ = Patient Health Questionnaire.
