. Author manuscript; available in PMC: 2020 Sep 8.

Published in final edited form as: Am J Prev Med. 2018 Oct 24;56(1):27–37. doi: 10.1016/j.amepre.2018.06.025

Table 1:

Demographic and smoking characteristics: The 1991, 1992, and 1995 National Health Interview Survey

	All	Never smokers	Current smokers			Former smokers
			Daily	Non-daily		Ever daily	Never daily
				Previously daily	Lifelong non-daily
N	70,913 (100)	36,013 (100)	15,419 (100)	2,039 (100)	1,127 (100)	14,580 (100)	1,735 (100)
Survey year
1991	42,454 (32.7)	21,343 (32.3)	9,457 (33.7)	1,124 (29.2)	673 (32.2)	8,908 (34.0)	949 (27.7)
1992	11,664 (33.1)	5,873 (32.6)	2,582 (33.9)	299 (30.8)	246 (40.6)	2,308 (32.2)	356 (39.9)
1995	16,795 (34.2)	8,797 (35.1)	3,380 (32.4)	616 (40.0)	208 (27.1)	3,364 (33.8)	430 (32.4)
Age at interview	41 (30 – 57)	38 (28 – 55)	40 (31 – 52)	38 (29 – 49)	32 (25 – 41)	52 (40 – 66)	43 (32 – 59)
Sex
Male	29,943 (47.7)	12,607 (40.7)	7,236 (52.6)	902 (49.5)	517 (53.9)	7,813 (58.1)	868 (57.2)
Female	40,970 (52.3)	23,406 (59.3)	8,183 (47.4)	1,137 (50.5)	610 (46.1)	6,767 (41.9)	867 (42.8)
Race_^a
Non-Hispanic white	52,707 (76.7)	25,303 (72.2)	11,962 (81.0)	1,379 (72.0)	586 (53.5)	12,190 (85.6)	1,287 (77.2)
Non-Hispanic black	9,140 (10.9)	5,007 (12.2)	2,124 (10.9)	368 (14.5)	259 (19.1)	1,193 (6.8)	189 (8.5)
Hispanic	6,735 (8.4)	4,227 (10.5)	958 (5.2)	227 (9.4)	227 (19.1)	890 (5.1)	206 (11.0)
Other	2,082 (3.7)	1,329 (4.7)	320 (2.5)	60 (3.9)	49 (7.3)	273 (2.3)	51 (3.0)
Education_^b
< High school	15,335 (19.9)	7,166 (17.7)	4,106 (26.0)	398 (19.0)	262 (21.7)	3,116 (19.6)	287 (13.9)
High school	25,709 (37.2)	12,073 (34.3)	6,689 (44.6)	733 (36.3)	397 (34.7)	5,217 (36.9)	600 (36.6)
Some college	15,059 (21.5)	7,820 (22.3)	2,986 (19.2)	515 (23.9)	269 (23.6)	3,090 (21.5)	379 (22.1)
College	14,639 (21.2)	8,872 (25.5)	1,599 (9.9)	388 (20.5)	196 (19.3)	3,118 (21.7)	466 (27.1)
Smoking characteristics
Age when first started smoking fairly regularly (1992; N = 5,545)	17 (15 – 20)	-	17 (15 – 19)	18 (16 – 20)	18 (16 – 22)	17 (15 – 19)	18 (16 – 20)
Age when first tried smoking cigarettes (1995; N = 7,862)	16 (13 – 18)	-	15 (13 – 18)	16 (14 – 18)	16 (14 – 18)	16 (13 – 18)	16 (14 – 18)
Number of days smoked in the past 30 days_^c	15 (5 – 20)	-	-	15 (8 – 20)	10 (4 – 15)	-	-
Number of cigarettes smoked per day_^d	20 (12 – 20)	-	20 (12 – 20)		-	-	-
Number of cigarettes smoked per day on days smoked_^e	4 (2 – 7)	-	-	4 (2 – 10)	3 (2 – 5)	-	-
Number of months since the last time smoking daily_^f (1991 and 1992)	12 (3 – 60)	-	-	12 (3 – 60)	-	-	-
Age at cessation_^g (1992 and 1995)	36 (26 – 49)	-	-	-	-	37 (28 – 50)	26 (21 – 36)
Number of years since cessation_^g (1992 and 1995)	10 (4 – 20)	-	-	-	-	10 (4 – 20)	12 (4 – 25)
Ever use of other tobacco products_^h (1991 and 1992)	7,567 (15.7)	1,733 (7.1)	2,180 (21.1)	245 (18.6)	103 (12.5)	3,003 (29.4)	303 (26.0)

Weighted median and interquartile range (IQR) for continuous variables; N (weighted %) for categorical variables.

Missing values were identified for 249 individuals (0.4%).

Missing values were identified for 171 individuals (0.3%).

Only for current non-daily smokers (N = 2,915)

Only for current daily smokers (N = 15,294)

Only for current non-daily smokers (N = 2,918)

Only for current non-daily smoker who ever smoked daily (N = 1,288)

Only for former smokers (N = 5,213)

Reporting ever-using cigars at least 50 times, pipe at least 50 times, chewing tobacco at least 20 times, or snuff at least 20 times on the 1991 and 1992 surveys (completed by 54,118 participants).