Table 2. Comparative results in evaluated subgroups with regard to smoking prevalence among women.

Subgroup	Prevalence rate	P	95% CI	incongruity	I2
Students	0.19%	0.00-1	0-0.47	4.3	0.54
Adults	2.12%	0.00-1	1.1-3.1	140.1	0.96
National studies	5.098%	0.00-1	1.4-8.7	1229.4	0.99