Research Article

Continuous Femoral Nerve Block versus Intravenous Patient Controlled Analgesia for Knee Mobility and Long-Term Pain in Patients Receiving Total Knee Replacement: A Randomized Controlled Trial

Table 2

Preoperative comorbidity of enrolled participants.

Preoperative comorbidityCFNB groupPCIA group value
(%) (%)

Cardiovascular system
 Hypertension41/140 (34.2)29/140 (24.2)0.098
 Coronary artery disease7/140 (5.8)7/140 (5.8)1.000
Arrhythmia
 Atrial fibrillation1/140 (0.8)1/140 (0.8)1.000*
 Ventricular premature0/140 (0)3/140 (2.5)0.247*
 Sinus bradycardia0/140 (0)2/140 (1.7)0.498*
Respiratory system
 Asthma2/140 (1.7)0/140 (0)0.498*
 COPD4/140 (3.3)8/140 (5.7)0.238
 Respiratory failure 1/140 (0.8)1/140 (0.8)1.000*
Urological system
 Renal syndrome0/140 (0)1/140 (0.8)0.500*
 Renal failure0/140 (0)1/140 (0.8)0.500*
Endocrine system and autoimmune disease
 Diabetes18/140 (15)9/140 (7.5)0.068
 Rheumatoid arthritis0/140 (0)3/140 (2.1) 0.247*
Thromboembolic events
 Cerebral embolism2/140 (1.7)0/140 (0)0.498*
 Myocardial infraction0/140 (0)0/140 (0)
 Venous thrombosis0/140 (0)2/140 (1.7)0.498*
 Peripheral artery embolism0/140 (0)0/140 (0)

Categorical variables as number of events (), Chi square test was used; events less than 5 were compared with Fisher’s exact test, .