Relation of Secondhand Smoking to Mild Cognitive Impairment in Older Inpatients

Table 2

Cognitive levels and smoking history.

	Dementia (𝑛=124)	MCI (𝑛=98)	C (𝑛=711)	Total (𝑛=933)
Never smokers	25 (20)^∗†	9 (9)^‡	306 (43)	340 (36.5)
Former-active smokers/no SHS	79 (64)*	49 (51)	284 (40)	412 (44.5)
Active smokers	5 (4)^†	16 (16)^§	64 (9)	85 (9)
Secondhand smokers	15 (12)^†	24 (24)^‡	57 (8)	96 (10)

χ ² test
Number of patients and frequency (%) are reported.
* Dementia versus C 𝑃<0.001; ^†Dementia versus MCI 𝑃<0.05; ^‡MCI versus C 𝑃<0.001; ^§MCI versus C 𝑃<0.05.