Do trends in population levels of blood pressure and other cardiovascular risk factors explain trends in stroke event rates? - methodological appendix

Table A3c. Sensitivity analysis for multiple regression model between trends in systolic blood pressure and daily cigarette smoking and trends in stroke event rates
Period Quality weighting Excluding Explanatory variable Men Women
Coeff.
(95% CI)		 % variation explained Coeff.
(95% CI)		 % variation explained
Full No Nothing Systolic bp 0.00
(-0.02,0.02)		 0 0.02
(-0.01,0.04)		 24
Daily smoking 0.00
(-0.02,0.02)		 -0.01
(-0.04,0.02)
Populations with low quality Systolic bp 0.00
(-0.02,0.03)		 3 0.02
(-0.02,0.05)		 17
Daily smoking 0.00
(-0.02,0.02)		 -0.01
(-0.04,0.03)
Yes SAH Systolic bp 0.00
(-0.03,0.03)		 0 0.02
(-0.01,0.05)		 21
Daily smoking 0.00
(-0.02,0.02)		 -0.01
(-0.05,0.02)
< 55 years old Systolic bp 0.00
(-0.02,0.02)		 7 0.03
(0.00,0.06)		 44
Daily smoking 0.00
(-0.02,0.01)		 -0.01
(-0.05,0.02)
Lagged No Nothing Systolic bp -0.01
(-0.05,0.03)		 4 0.04
(0.00,0.08)		 40
Daily smoking 0.00
(-0.03,0.03)		 -0.01
(-0.06,0.04)
Populations with low quality Systolic bp * * 0.02
(-0.03,0.08)		 17
Daily smoking * 0.00
(-0.05,0.06)
Yes SAH Systolic bp 0.00
(-0.04,0.04)		 0 0.04
(-0.01,0.10)		 30
Daily smoking 0.00
(-0.03,0.03)		 -0.01
(-0.07,0.05)
< 55 years old Systolic bp * * 0.04
(-0.02,0.09)		 30
Daily smoking * -0.02
(-0.07,0.05)

* Model cannot be fitted