Table 2. P‐values and r‐values of correlation between C‐peptide immunoreactivity and measures of variables.
| FCPR (ng/mL) | CPR‐6min (ng/mL) | PPCPR (ng/mL) | |
|---|---|---|---|
| Age (years) | 0.4257 (ND) | 0.0456 (−0.121) | 0.3896 (ND) |
| Years from diagnosis | 0.0024 (−0.182) | <0.0001 (−0.246) | 0.0007 (−0.205) |
| Sex | 0.0709 (ND) | 0.1879 (ND) | 0.8321 (ND) |
| BMI (kg/m2) | <0.0001 (0.435) | <0.0001 (0.367) | <0.0001 (0.311) |
| Systolic blood pressure (mmHg) | 0.5551 (ND) | 0.9388 (ND) | 0.0865 (ND) |
| Diastolic blood pressure (mmHg) | 0.5739 (ND) | 0.0327 (0.130) | 0.0705 (ND) |
| HbA1c (%) | 0.0443 (−0.122) | 0.1507 (ND) | <0.0001 (−0.410) |
| sCre (mg/dL) | 0.0104 (0.155) | 0.1641 (ND) | 0.0140 (0.148) |
| FPG (mg/dL) | 0.3764 (ND) | ND | ND |
| PG‐6min (mg/dL) | ND | 0.7333 (ND) | ND |
| PPPG (mg/dL) | ND | ND | <0.0001 (−0.285) |
All correlations except correlations between sex and C‐peptide immunoreactivity (CPR) were analyzed by Pearson’s analysis. Correlations between sex and CPR were analyzed by Spearman’s analysis. P‐values are shown. In parenthesis, r‐values are shown.
BMI, body mass index; CPR‐6min, C‐peptide immunoreactivity 6 min after intravenous injection of 1 mg glucagon; FCPR, fasting CPR; FPG, fasting plasma glucose; ND, not determined; PG‐6min, plasma glucose 6 min after glucagon load; PPCPR: postprandial CPR; PPPG: postprandial plasma glucose; sCre: serum creatinine.