Table 2.

Results of the Poisson regression model

Variable and category	IRR (95% CI)	P
DS	3.67 (2.43–5.55)	0.000
Calendar year (per year)	1.09 (1.04–1.13)	0.000
Calendar year squared	1.00 (1.00–1.00)	0.001
Age (per year)	1.06 (1.04–1.08)	0.000
Age squared	1.00 (1.00–1.00)	0.031
DS-age interaction	0.96 (0.96–0.97)	0.000
BMI category
Not recorded	0.32 (0.26–0.40)	0.000
Underweight	0.60 (0.26–1.35)	0.22
Normal weight	Reference
Overweight	1.92 (1.59–2.31)	0.000
Obese	4.43 (3.74–5.25)	0.000
Sex
Male	Reference
Female	0.76 (0.69–0.84)	0.000

Diabetes IRRs were adjusted for each of the variables shown.