Time-Series Analysis of Continuously Monitored Blood Glucose: The Impacts of Geographic and Daily Lifestyle Factors

Table 2

Correlation with mean blood glucose calculated over 12-hour periods (, 34 participants × 5 twelve hour periods).

Explanatory variable; (in last 12-hour period)	Correlation with mean BG
Movement intensity	−0.072
Calories consumed	0.071
Medicines taken	−0.015
Insulin taken	0.050
Exercise time	−0.127
At-home time	−0.240^**
Work/school time	0.124
Shopping time	0.003
Restaurant time	0.099
Automobile time	0.169^*
Public transit time	0.076
Time spent with others^a	0.200^**
Day/night	−0.204^**
Out-of-home time	0.226^**
Travel time	0.181^*
Average distance from home^b	0.363^**

Correlation is significant at the 0.05 level (2-tailed).
^**Correlation is significant at the 0.01 level (2-tailed).
^aPrimarily due to one participant reporting substantially more time spent with another person. If this person is removed, correlation drops to 0.055 and 0.016.
^bHeavily influenced by one participant with an average distance of home some three times higher than the next highest. Removing this person reduced correlations to 0.228^** and 0.157^*.