Table 2.

Comparison of salivary flow rate (SFR), IgA levels and clinical oral dryness (COD) scores between active and passive smokers from the outpatient department of the Altamash Institute of Dental Medicine, Karachi, Pakistan, June 2019

Variable	Participants (N = 217)		p*
	active smokers (N = 54)	passive smokers (N = 163)
SFR [ml/min] (M±SD)	0.374±0.13	0.429±0.08	0.001
IgA [g/l] (M±SD)	1.392±0.17	1.470±0.13	0.001
COD score (M±SD)	1.43±1.22	0.87±1.05	0.001

^*In the t-test, p < 0.05 displays a significant difference between the 2 study groups.