12 months prior to interview. In this analysis, “success” in quitting was
arbitrarily defined as persons who had recently been regular smokers
who had attempted to quit within 12 months and who had not smoked
for at least 6 months prior to interview. Persons who smoked regularly
within 1 year prior to the interview and who had attempted to quit
during the last year but had been off cigarettes less than 6 months are
excluded from consideration in this analysis. Unsuccessful quitters
were defined as regular smokers at the time of interview who reported
having attempted seriously to quit at least once within the 12 months
prior to interview date. Interpretation of these data is complicated by
the fact that the primary brand reported for successful quitters
represents the brand smoked prior to a quit attempt, while unsuccess-
ful quitters’ brands are those smoked after a quit attempt. Thus, clear
distinction cannot be made between the possible explanations. The
data show that higher proportions of smokers who use the two lowest
“tar” or nicotine cigarette products are found among the unsuccessful
quitters than among successful quitters. The proportion of recent
regular smokers who use cigarettes yielding <5 mg of “tar” is lowest
for persons who did not attempt to quit (3.8 percent), intermediate
among those who succeeded in quitting (4.6 percent), and highest
among those who failed at an attempt to quit (4.9 percent).

Grouping these smokers into larger categories by “tar” level (e.g.,
the percent smoking cigarettes yielding <10 mg or those smoking
cigarettes yielding <15 mg “tar”) shows that a lower proportion of
recent smokers who successfully quit used lower “tar” products than
do recent smokers who did not attempt to quit, while smokers who
failed in an attempt to quit reported smoking lower “tar” products in
the highest proportions. Conversely, a lower proportion of unsuccessful
attempters currently smoke higher “tar” products (65.3 percent) than
is found among either nonattempters (69.0 percent) or successful
quitters (72.2 percent). A similar relationship was observed by nicotine
yield: the proportion of persons choosing the lower yield products
(<1.0 mg) was highest for unsuccessful quitters, intermediate for
nonattempters, and lowest among successful quitters.

Thus, these data are consistent with the postulated tendency of
smokers to switch to lower “tar” and nicotine cigarettes following an
unsuccessful attempt to quit smoking.

The relationship between number of serious attempts to quit
smoking and the “tar” or nicotine yield of the primary cigarette
smoked is shown in Table 11. Note should be taken that the table
includes only current regular smokers who have tried at least once to
quit. For the lowest categories of “tar” and nicotine yields, there is a
suggestion of a shift in the population toward a greater number of
cessation attempts. No significant difference is observed in the
frequency distributions of smokers of other “tar” and nicotine
products.

226
TABLE 10.—Estimated percentage distribution of recent smokers
by status of recent attempt to quit, by “tar” or
nicotine yield of primary brand, July 1978 through
December 1979*

 

 

 

Status of “Tar” yi
recent
attempt to <5 mg 5-9 mg 10-14 mg 15-19 mg >20 mg Total
quit smoking % (n) % (n) % (n) % (n) % (n) % (n)
Successful 4.6 (13) 5.6 (16) 17.6 (50) 68.4 (180) 88 (25) 23 284
Unsuccessful 4.9 (152) 9.2 (286) 20.5 (686) 59.7 (1849) 5.6 (175) 25.6 3098
No attempt 3.8 (355) 83 (721) 19.0 (1655) 58.1 (5070) = 10.9 (950) 72.1 8731
Total 4.1 (500) 8.4 (1023) 19.3 (2341) 58.6 (7099) 9.5 (1150) = 100.0 12118
Nicoti ‘eld of pri brand

<0.5 mg 05-09 mg 1012mg 13-16 mg >1.7 mg

% (n) % (n) % (n) % (n) % {n)
Successful 46 (13) 26.8 (76) 43.0 (122) 2.0 (71) 07 (2) 23 284

Unsuccessful 5.0 (155) 82.2 (999) 39.7 (1229) 223 (692) 0.7 (28) 2.6 3098
No attempt 4.0 (351) 29.2 (2553) 38.3 (3340) 27.1 (2368) 14 (119) 721 8731
Total 4.3 (519) 30.0 (3628) 38.7 (4691) 28.8 (3131) L2 (144) 100.0 12113

 

*Unweighted data.
SOURCE: Based on data from the 1979 Smoking Supplement of the National Health Interview Survey.

TABLE 11.—Estimated percentage distribution of current regular
smokers by number of serious attempts to quit
smoking, by “tar” or nicotine level, U.S., 1979

 

Number of seri :
“Tar” level (mg) 2 Ss 4 25
<5 213 29.1 10.6 6.0 2.1
5-9 35.7 28.9 158 44 152
10-14 36.9 29.1 14.6 55 18.9
15-19 38.6 26.3 14.7 53 15.0
>20 37.6 27 149 54 18.5
Total 37.3 21 146 5.3 15.7
Nicotine leve] (mg)
<05 26.8 29.4 102 5.7 278
0.5-0.9 374 28.6 14.9 51 141
1.0-12 39.5 26.7 14.1 5.0 14.7
13-16 35.9 25.2 15.7 62 17.0
>17 38.6 25.1 21.1 23 129
Total 37.3 1 146 53 15.7

 

SOURCE: Based on data from the 1979 Smoking Supplement of the National Health Interview Survey.

The relationship of cigarette choice to the duration of the most
recent unsuccessful quit attempt is shown in Table 12 for current
regular smokers. Although there are large variations in the individual
durations within each “tar” or nicotine grouping, the mean durations

227
TABLE 12.—Mean duration of most recent attempt to quit, by
“tar” or nicotine yield of current primary brand,
current regular smokers, 1979*

 

 

-Mean number of days
“Tar” yield (n)
<5 mg 3.4 (132)
5-9 mg 3.1 (247)
10-14 mg 38 (566)
15-19 mg 3.5 (1647)
>20 mg 47 (144)
Total 3.6 (2736)
<0.5 mg 3.4 (188)
0.5-0.9 mg 3.7 (885)
10-12 mg 3.3 (1080)
13-16 mg 3.9 (622)
>1.7 mg 68 (16)
Total 3.6 (2736)
*Unweighted data,

SOURCE: Based on data from the 1979 Smoking Supplement of the National Health Interview Survey.

do not exhibit a relationship to either “tar” or nicotine yield. The
higher mean duration of quit attempt among the smokers of highest
yield products must be interpreted in light of the small numbers of
individuals within those yield groupings.

Summary

1. Public awareness of the dangers of smoking has steadily
increased since 1965. In 1978, more than 90 percent of all
Americans believed cigarette smoking to be hazardous to health.

2. Cigarette product choice has shifted dramatically since the 1950s.
In 1979, 91.7 percent of U.S. smokers used filter-tipped ciga-
rettes, compared with 1.4 percent in the early 1950s.

3. Lower “tar” cigarettes conventionally have been defined as
yielding 15 mg of “tar” or less per cigarette. The proportion of all
cigarettes consumed in the United States that are lower “tar”
has increased from 3.6 percent in 1970 to almost 50 percent in
1979. In 1979, 58.5 percent of all cigarette brands marketed in the
United States yielded 15 or fewer mg of “tar.”

4. Since 1968, the “tar” content of the “average cigarette” in the
United States has declined by 32.2 percent, and nicotine content
has fallen by 25.6 percent. These declines may be partially
accounted for by lower tobacco weight per cigarette—down 23.8
percent from 1968 to 1978—and by the greater length of the
filter and overwrap of the average cigarette, which could result
in a declining number of machine puffs per cigarette.
5. The prevalence of smoking in the U.S. adult and adolescent
populations has continued to decline. In 1979, 32.5 percent of the
adult population smoked cigarettes (36.1 percent of men and 29.4
percent of women). However, evidence suggests that the average
daily number of cigarettes consumed by those adults who
continue to smoke has increased over several decades. The
availability and use of lower “tar” cigarettes have increased over
recent years.

6. In 1979, 33.3 percent of adult regular smokers used cigarettes
yielding 15 mg “tar” or less. Studies show that women smokers
are more likely to use lower yield cigarettes than men are, and
white smokers use lower yield cigarettes in greater proportions
than do blacks. Smokers of higher income and education also
select lower yield cigarettes in a higher percent of cases.

7. A large national survey found that smokers in older aged cohorts
choose both the lowest and highest yield cigarettes in higher
proportions than do younger cohorts.

8. Although black smokers choose cigarettes of higher “tar” and
nicotine in greater proportions than do whites, the lower daily
number of cigarettes smoked by blacks suggests that their
average daily intake of “tar” and nicotine may be lower than that
of white smokers.

9. In 1979, 33.5 percent of adolescent smokers (age 12 to 18) used
lower “tar” cigarettes, compared with 6.7 percent in 1974. Boys
and girls smoke cigarettes of about the same level of “tar”
content.

10. Adult smokers started smoking regularly at the average age of
18 years. One survey showed that the higher the “tar” level of the
cigarette currently smoked, the younger the reported age of
beginning smoking.

11. Evidence from a large national survey does not support a
correlation between a greater mean number of cigarettes smoked
per day by users of lower “tar” and nicotine cigarettes than by
higher “tar” users.

12.In a national survey, smokers of lower “tar” and nicotine
cigarettes more frequently reported having attempted to quit at
least once, and among these smokers, a higher proportion report
having attempted unsuccessfully to quit multiple times. The
applicability of these data to defining of the role of “tar” or
nicotine yields of cigarettes in quitting behavior is not clear in
the absence of more detailed longitudinal data.

18. Although a greater proportion of unsuccessful quitters reported
smoking the lowest “tar” and nicotine products than did recent
successful quitters in one large survey, interpretation of these
data is made difficult by the noncomparability of brand reported

229
(ie., unsuccessful quitters reported the brand smoked after an
attempt, successful quitters reported the brand smoked prior to
the attempt).

14.In a large national survey, the mean duration of the latest
unsuccessful attempt to quit shows no clear relationship to “tar”
or nicotine yields.

Addendum: Comparison of “Tar” and Nicotine Yields of
Cigarettes in 1978 and 1979

The Federal Trade Commission (FTC) has conducted tests of
commercially available cigarettes in the United States since 1968. The
FTC measures “tar” and nicotine yields of approximately 99.5 percent
of the brands available in the United States and issues annual reports
on these measurements.

This discussion examines the changes in cigarette yields from 1978 to
1979 as published by the FTC. The following should be helpful in
estimating to what extent the coding of NHIS brand data for 1979 by
the “tar” yields measured in 1978 might influence the results presented
above in this section.

Yields of “Tar” and Nicotine

The cigarettes tested in 1978 (sample collected in 1977) had a mean
“tar” yield of 15.4 mg and in 1979 (sample collected in 1979) the mean
“tar” yield was 13.6. The corresponding mean yields of nicotine were
1.02 and 0.97 mg in the 1978 and 1979 FTC reports (Table 18). These
reductions in yields occurred regardless of the different parameters of
cigarette type (length, menthol/plain, package type, and fil-
ter/nonfilter). If only filter-tipped cigarettes are considered, the mean
nicotine yield declined from 0.95 to 0.90 mg. For all 1979 varieties,
there was a significant difference in “tar” yield between filter and
nonfilter cigarettes, and between menthol and nonmenthol varieties of
cigarettes. Examining filtered cigarettes only, the length of cigarette
was the only parameter that showed a significant difference in mean
“tar” level.

Correlation of Varieties Reported in 1978 and 1979

There were 144 varieties of cigarettes marketed in both years (1978
and 1979) that were unchanged, as defined by exact variety name,
length, menthol and filter status, and package type. Despite the
identity of all five parameters, the mean “tar” level of varieties
declined over the period mentioned (Table 14). The mean “tar” level
declined from 15.3 mg in 1978 to 148 in 1979; for filter-tipped
cigarettes only, the mean “tar” level declined from 13.8 to 13.3 mg.
These decreases, although slight in absolute terms, are statistically
significant. The change in nicotine yields for these same brands of
cigarettes over the same period is negligible.

230
TS?

TABLE 13.—Mean yield of “tar” and nicotine of cigarettes, by type of modifier, all and filtertip varieties, U.S.,
1978 and 1979

 

 

 

 

All varieties Filtertip varieties
“Tar” (mg) Nicotine (mg) No. of varieties “Tar” (mg) Nicotine (mg) No. of varieties
Type of modifier 1978 1979 1978 1979 1978 1979 1978 1979 1978 1979 1978 1979
Soft 15.9 13.4 1.08 0.96 188 149 140 122 0.97 0.90 119 184
Hard 15.1 14.7 1.00 1.04 2 21 18.4 18.3 0.88 0.91 26 24
Filter 13.9 12.4** 0.95 0.90** 145 158 - - - - - -
Nonfilter 25.1 24.7 1.48 1.58 22 18 - - - - - -
<100 mm 15.4 13.4 0.99 0.93 99 100 12.6 10.9°* 0.85 0.80°* 7 82
>100 mm 15.3 14.0 1.06 1.01 68 76 16.3 14.0 1.06 1.01 68 %
Menthol 14.0 12.2* 0.97 0.90 58 64 13.8 12.2 0.96 0.90 57 64
Regular 16.1 14.4 1.05 1.01 109 112 13.9 125 0.96 0.90 88 94
Total 15.4 13.6 1.02 0.97 167 176 13.9 124 0.95 0.90 145 158
*P <.001.
*P <.06.

SOURCE: Federal Trade Commission (4, 5).
68S

TABLE 14.—Mean yield of “tar” and nicotine of the varieties of cigarette marketed in both 1
type of modifier, all and filtertip varieties, U.S.

978 and 1979, by

 

All varieties

 

 

Filtertip varieties

 

 

 

“Tar” (mg) Nicotine (mg) “Tar” (mg) Nicotine (mg)

Type of modifier 1978 1979 1978 1979 No. of varieties 1978 1979 1978 1979 No. of varieties
Soft 15.2 14.7°* 1.03 1.08 119 39 13.3** 0.96 0.97 104
Hard 15.5 15.0 1.08 106 v3) 18.5 13.4 0.89 0.92 22
Filter 138 13.8** 0.95 0.96 126 - - - - -
Nonfilter 25.6 24.7 1.58 158 18 - - - - -
<100 mm 153 14.8* 1.01 102 83 125 12.1° 0.85 0.86 65
>100 mm 152 14.7* 1. 05 1.06 61 16.2 14.7* 1.05 1.06 61
Menthol 14.0 13.4° 0.97 0.97 54 139 13.8° 0.97 0.96 58
Regular 16.0 15.6* 1.06 108 90 18.8 13.4" 0.94 0.95 B
Total 15.3 14.8°* 1.03 1.08 14 13.8 18.3** 0.95 0.96 126
**P <.001.
°P <0.

SOURCE: Federal Trade Commission (4, 5)
TABLE 15.—Comparison of “tar” and nicotine yield on the
varieties of cigarette marketed in both 1978 and

 

1979, U.S.
“Tar” yield Mean “tar” Mean nicotine No. of
in year difference (mg) difference (mg) varieties
1978 = 1979 - 0.0157 7
1978 < 1979 0.6945 0.0829 55
1978 > 1979 1.3366 0.0478 82
Total 0.4958 0.0052 144

 

SOURCE: Federal Trade Commission (4, 5).

Further examination of the changes in the “tar” and nicotine yield
occurring in the same varieties of cigarettes over this period is
presented in Table 15. Of the 144 brands reported on in both periods,
only 7 showed no difference in mean “tar” level. Fifty-five brands
showed a slight increase, with the mean difference being less than 1
mg. Eighty-two brands, however, showed a decline from the 1978
reported yields to the 1979 yield. Once again, however, the mean
decrease was small, only 1.3 mg.

“Tar” and Nicotine Yields of New Brands in 1979

There were 32 varieties of cigarettes defined as new in the 1979 FTC
report (Tables 16 and 17). A “new” variety was defined as a different
name (such as a varietal name change by addition of the word
“lights”), or by a change in one of the other four varietal parameters of
filter, length, package type, or menthol status (eg., a nonfiltered
cigarette changing to filtered). The average “tar” and nicotine yields
for these 32 new brands in 1979 were 8.5 and 0.67 mg, respectively.
Except for a single new variety, the new varieties yielded less than 15
mg of “tar,” with two-thirds of them yielding less than 10 mg “tar.” A
similar examination of new 1979 varieties by nicotine yield showed a
similar trend toward lower yields, with 81 percent of them yielding less
than 0.9 mg of nicotine.

Applications to the Discussion

As noted in the body of this Report, all NHIS variety data on the
Smoking Supplement collected in interviews during 1978 and 1979
were coded to the FTC 1978 “tar” and nicotine yields. Since the
cigarettes reported on in 1978 were collected in 1977, and since the
updated measures of yield for 1979 were not available in time for their
use in coding the 1979 smoking data, the described distribution of
smokers by “tar” and nicotine yields of their cigarettes is conservative
and underestimates to some extent the proportion of smokers who use
lower yield products.
TABLE 16.—Mean yield of “tar” and nicotine of the new
varieties of cigarette marketed in 1979, by type of
modifier, U.S.

 

Type of

modifier 46 Jr Ni . ( } N f . >
Soft 8.3 0.66 30
Hard 117 0.82 2
Filter 85 0.67 82
Nonfilter - - -
<100 mm 6.5 0.54 17
2100 mm 10.8 0.82 15
Menthol 70 0.57 n
Regular 9.4 0.72 21
Total 85 0.67 32

 

SOURCE: Federal Trade Commission (4, 5).

TABLE 17.—Distribution of “tar” and nicotine yield of the new
varieties of cigarette marketed in 1979, U.S.

 

 

 

<5 5-9.9 10.0-14.9 15.0-19.9 Total
N 7 4 10 1 32
% 21.9 43.8 313 3.1 100.0
Nicoti ield
<0.49 0.50-0.69 0.70-0.89 0,90-1.09 1.10-1.29 Total
N 9 4 13 4 2 82
% 21 125 40.6 125 638 100.0

 

SOURCE: Federal Trade Commission (4, 5).
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