Table 2

Correlation analysis of saliva 1,5-AG with serum 1,5-AG, glycemic, insulin sensitivity and secretion indicators

Spearman correlation
Saliva 1,5-AG,
μg/mL
Partial correlation
Saliva 1,5-AG,
μg/mL
rP valuerP value
Age0.0420.484
BMI0.1130.058
Duration0.0290.626
HbA1c, %−0.1300.029−0.1450.016
GA, %−0.1980.001−0.1810.002
Serum 1,5-AG, μg/mL0.285<0.0010.1990.001
FPG, mmol/L−0.0340.570−0.1150.056
PG30, mmol/L−0.1470.013−0.2030.001
2hPG, mmol/L−0.1390.019−0.215<0.001
HOMA2-%β0.1320.0270.0970.108
HOMA2-IR0.0990.0960.0420.488
QUICKI0.0020.9750.1110.064
ISI−0.0740.2120.0550.360
CGI0.1710.0040.1390.020
△2hCP/△2hPG0.1820.0020.0870.149
AUCCP30/AUCPG300.1740.0030.1260.035
AUC2hCP/AUC2hPG0.1650.0050.0910.130
  • Partial correlation analysis was adjusted for age, sex, body mass index, and diabetes duration.

  • 1,5-AG, 1,5-anhydroglucitol; AUC, area under the curve; AUCCP30/AUCPG30, ratio of 0–30 min area under the curve for C-peptide and area under the curve for glucose; BMI, body mass index; CGI, C-peptidogenic index; CP30, 30 min C-peptide; FPG, fasting plasma glucose; GA, glycated albumin; HbA1c, glycated hemoglobin A1c; 2hCP, 2-hour C-peptide; HOMA2-%β, homeostasis model assessment 2 for β cell function; HOMA2-IR, homeostasis model assessment 2 for insulin resistance; 2hPG, 2-hour postload glucose; ISI, insulin sensitivity index; PG30, 30 min postload glucose; QUICKI, quantitative insulin-sensitivity check index.