N

Mean ± SD

Std. error

P value

C-peptide

Smokers

78

11.00 ± 2.51

0.535

0.887

Non-smokers

103

10.71 ± 3.53

0.268

Hypertensive

38

8.79 ± 3.72

0.605

0.083

Normotensive

143

7.61 ± 3.44

0.288

Male

111

7.87 ± 3.57

0.339

0.933

Female

70

7.83 ± 3.48

0.417