Prevalence and Risk Factors of Prolonged QTc Interval among Chinese Patients with Type 2 Diabetes

Table 1

Baseline characteristics of the study population.

Factors	QTc > 0.44 s	QTc ≦ 0.44 s	𝑃 value
	(𝑛=951)	(𝑛=2205)
Age (years)^†	55.4±11.0	54.7±10.7	0.070
Sex (male/female)	457/494	1274/931	<0.000
Height (m)^†	1.64±0.08	1.65±0.08	<0.001
Body weight (kg)^†	70.0±12.5	70.1±12.0	0.175
BMI (kg/m^2)^†	26.1±3.7	25.9±3.2	0.106
Waist circumference^†	89.6±9.7	88.4±9.5	0.001
Hip circumference^†	95.3±7.4	94.5±6.6	0.003
WHR^†	0.94±0.07	0.93±0.07	0.072
Smoking (%)	33.4	36.4	0.109
Duration of diabetes (years)^‡	4 (1, 8)	3 (0.5, 7)	0.001
HbA1c (%)^†	8.1±2.1	7.6±1.8	<0.001
Systolic blood pressure (mmHg)^†	134.0±20.0	130.0±18.8	<0.001
Diastolic blood pressure (mmHg)^†	76.8±10.1	74.5±9.5	<0.001
Fasting blood glucose (mmol/L)^†	8.6±2.9	8.6±3.1	0.778
Postprandial blood glucose (mmol/L)^†	13.8±5.1	12.7±4.7	<0.001
Fasting plasma insulin (μIU/mL)^‡	7.61 (4.59, 11.99)	7.30 (4.05, 10.31)	<0.001
Postprandial plasma insulin (μIU/mL)^‡	25.16 (14.81, 46.4)	25.87 (13.73, 45.64)	0.427
Cholesterol (mmol/L)^†	5.14±1.11	5.02±1.06	0.005
LDL-C (mmol/L)^†	3.10±1.82	3.00±0.84	0.037
HDL-C (mmol/L)^†	1.27±0.29	1.26±0.30	0.826
Triglycerides (mg/L)^‡	1.71 (1.20, 2.3)	1.54 (1.05, 2.30)	<0.001
Microalbuminuria (%)	28.3	20.4	<0.001
Retinopathy (%)	14.1	13.1	0.436
Neuropathy (%)	36.7	36.7	0.984

BMI: body weight index, WHR: waist hip ratio, HbA1c: glycated hemoglobin, TC: total cholesterol, LDL-C: low density lipoprotein cholesterol, and HDL-C: high density lipoprotein cholesterol.
^†Data are mean ± SD.
^‡Data are median (quartile).