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Characteristics n (%) Gender Male 34 (17) Female 166 (83) Mean Age and range (Years) 54.4±11.9 (27-96) CTS sites Bilateral 131 (65.5) Unilateral 69 (34.5) Right 46 (23) left 23 (11.5) Non recordable nerves 29 (14.5) CTS risk factors Diabetic 112 (56) Non-Diabetic 88 (44) Other risk factors Hypertension 90 (45) Dyslipidemia 127 (63.5) Obesity 146 (73) Hypothyroidism 15 (7.5) Rheumatoid arthritis 2 (1) Corticosteroid use 1 (0.5) Body parameters Mean±SD Height 156.5±7.7 Weight 83±16.1 BMI 34.1±6.5 Systolic BP 135±16.1 Diastolic BP 78±8.6 Lab parameters Mean±SD Serum cholesterol (<=200mg/dl) 180.8±39.9 Serum LDL (<100mg/dl) 110±34.4 Serum HDL (35-60mg/dl) 51.4±15.1 Serum triglyceride (<=150mg/dl) 115.4±69.1 Fasting blood sugar (70-99mg/dl) 128±54.8 Mean HBa1c and range (4.5-13.4) 6.9±1.76 (4-6) CTS - carpal tunnel syndrome, HBa1c - glycosylated hemoglobin type A1C, BMI - body mass index, BP - blood pressure, LDL - low-density lipoprotein, HDL - high density lipoprotein, SD - standard deviation.
- Table 2
Description of demography and prevalence of other CTS risk factors among diabetic and non-diabetic with CTS in study population (N=200).
Variables Diabetic (n=140) Non-diabetic (n=104) P-value* n (%) Gender Male 23 (20.5) 11 (12.5) 0.13 Female 89 (79.5) 77 (87.5) Hypertension 61 (54.5) 29 (33.3) 0.003 Dyslipidemia 74 (66.1) 53 (60.2) 0.39 Obesity 90 (80.4) 56 (63.3) 0.01 Hypothyroidism 7 (6.3) 8 (9.1) 0.44 Rheumatoid arthritis 0 (0) 2 (2.3) 0.10 Steroid therapy 1 (0.9) 0 (0) 0.37 ↵* Chi-square test, CTS - carpal tunnel syndrome
- Table 3
Description of electrophysiologic parameters and comparison among diabetic and non-diabetic.
Electrophysiologic parameter Diabetic Non-diabetic P-value Mean±SD MNSOL 4.4±0.8 4.2±1.2 0.19* MNSA 19.6±11.5 23.7±12.8 0.02* MNSCV 40.8±7.8 43.2±12.6 0.08* MNDML 4.7±1.1 4.6±1.3 0.42* MNMA 7.8±2.6 8.7±6.5 0.19* MNMCV 54.2±26.4 54.8±7.4 0.84* Non recordable nerves, n (%) 23 (20.5) 6 (6.8) 0.005† Bilateral CTS, n (%) 83 (74) 48 (54.5) 0.004† ↵* Independent sample t-test,
↵† Chi-square test, MNSOL - median nerve sensory onset latency, MNSA - median nerve sensory amplitude, MNSCV - median nerve sensory conduction velocity, MNDML - median nerve motor distal latency, MNMA - median nerve motor amplitude, MNMCV - median nerve motor conduction velocity, CTS - carpal tunnel syndrome, SD - standard deviation
Electrophysiologic parameter severity CTS hands Diabetic Non-diabetic P-value* n (%) Very Mild CTS 34 (17) 12 (10.7) 23 (25) 0.006 Mild CTS 155 (77.5) 86 (77.7) 65 (77.3) 0.88 Moderate CTS 45 (22.5) 28 (27.7) 14 (16) 0.14 Severe CTS 48 (24) 29 (25.9) 19 (21.6) 0.50 Very severe CTS 26 (9.4) 11 (9.9) 5 (9.1) 0.36 Extremely severe CTS 31 (15.5) 27 (24.1) 4 (4.5) <0.005 ↵* Chi-square test, CTS - carpal tunnel syndrome.
- Table 5
Comparison of factors that could affect the severity electrophysiological findings among diabetic and non-diabetic patients.
Risk factors Diabetic Non-diabetic P-value* Mean±SD Age 57.6±11.05 50.3±11.7 <0.001 BMI 35.3±6.9 32.5±5.6 0.002 Systolic BP 137.8±6.9 131.4±6.9 0.005 Diastolic BP 79±6.9 77.6±6.9 0.24 Serum cholesterol 175±41.0 188±37.5 0.02 Serum LDL 105±33.3 116±34.9 0.02 Serum HDL 48.1±14.8 55.6±14.3 <0.001 Serum triglyceride 134.7±78.9 91±43.7 <0.001 Fasting sugar 152.1±62.6 97.3±13.2 <0.001 HBa1c 7.6±1.8 5.6±0.35 <0.001 ↵* Independent sample t-test.
BMI - body mass index, BP - blood pressure, LDL - low-density lipoprotein, HDL - high density lipoprotein, HBa1c - glycosylated hemoglobin type A1C, SD - standard deviation.