1998 National Household Survey on Drug Abuse:  Population Estimates

Marijuana Frequency - Region

Table 20E. Frequency of Marijuana Use During Past Year by Age Group and Gender for Northeast Region in 1998

AGE/ /GENDER	At Least Once					12 or More Days					51 or More Days
	Observed Estimate	95% C.I.				Observed Estimate	95% C.I.				Observed Estimate	95% C.I.
RATE ESTIMATES (Percent)
AGE
12-17	15.4	(12.4	-	19.1)		8.0	(5.8	-	10.8)		5.6	(3.6	-	8.7)
18-25	22.4	(18.5	-	26.8)		13.1	(10.0	-	17.0)		6.9	(4.8	-	9.7)
26-34	9.9	(7.4	-	13.1)		4.5	(3.0	-	6.7)		3.3	(2.0	-	5.5)
$35	4.1	(2.6	-	6.5)		2.6	(1.4	-	4.9)		1.9	(0.9	-	4.3)
GENDER
Male	10.5	(8.2	-	13.2)		6.0	(4.3	-	8.5)		4.1	(2.5	-	6.6)
Female	6.3	(5.0	-	7.8)		3.4	(2.5	-	4.7)		2.1	(1.3	-	3.4)
TOTAL	8.3	(6.7	-	10.2)		4.7	(3.4	-	6.3)		3.1	(2.0	-	4.8)

POPULATION ESTIMATES (In Thousands)

AGE
12-17	627	(504	-	774)		325	(237	-	440)		229	(147	-	352)
18-25	1,106	(915	-	1,325)		650	(497	-	841)		339	(238	-	479)
26-34	666	(499	-	880)		301	(200	-	450)		221	(132	-	368)
$35	1,098	(692	-	1,726)		699	(370	-	1,304)		515	(229	-	1,141)
GENDER
Male	2,103	(1,651	-	2,661)		1,214	(857	-	1,706)		830	(512	-	1,331)
Female	1,394	(1,115	-	1,738)		760	(550	-	1,047)		474	(300	-	747)
TOTAL	3,497	(2,821	-	4,318)		1,974	(1,443	-	2,688)		1,304	(839	-	2,014)

Table 20F. Frequency of Marijuana Use During Past Year by Age Group and Gender for North Central Region in 1998

AGE/ /GENDER	At Least Once					12 or More Days					51 or More Days
	Observed Estimate	95% C.I.				Observed Estimate	95% C.I.				Observed Estimate	95% C.I.
RATE ESTIMATES (Percent)
AGE
12-17	15.0	(12.3	-	18.3)		7.8	(5.2	-	11.4)		5.0	(2.9	-	8.3)
18-25	30.0	(25.9	-	34.6)		17.8	(14.8	-	21.4)		12.1	(9.7	-	15.1)
26-34	10.3	(8.0	-	13.2)		5.4	(3.9	-	7.4)		3.2	(2.1	-	4.9)
$35	3.2	(2.2	-	4.7)		1.4	(0.9	-	2.3)		1.0	(0.5	-	1.9)
GENDER
Male	10.8	(9.2	-	12.7)		5.5	(4.5	-	6.7)		3.7	(2.8	-	4.8)
Female	7.4	(5.7	-	9.6)		4.2	(3.0	-	5.8)		2.8	(1.9	-	3.9)
TOTAL	9.1	(7.8	-	10.5)		4.8	(3.9	-	5.9)		3.2	(2.5	-	4.1)

POPULATION ESTIMATES (In Thousands)

AGE
12-17	817	(665	-	995)		421	(282	-	621)		269	(158	-	451)
18-25	1,991	(1,714	-	2,293)		1,182	(979	-	1,417)		805	(642	-	1,003)
26-34	809	(629	-	1,033)		423	(305	-	584)		252	(165	-	381)
$35	1,014	(697	-	1,468)		448	(275	-	726)		308	(162	-	584)
GENDER
Male	2,656	(2,258	-	3,114)		1,354	(1,106	-	1,654)		902	(695	-	1,169)
Female	1,975	(1,522	-	2,548)		1,120	(804	-	1,553)		731	(517	-	1,031)
TOTAL	4,631	(3,981	-	5,375)		2,474	(2,011	-	3,036)		1,634	(1,282	-	2,078)

* Low precision; no estimate reported.

NOTE: "At Least Once" is equivalent to "Used Past Year" in Table 3.

Source: Office of Applied Studies, SAMHSA, National Household Survey on Drug Abuse, 1998

Marijuana Frequency - Region

Table 20G. Frequency of Marijuana Use During Past Year by Age Group and Gender for South Region in 1998

AGE/ /GENDER	At Least Once					12 or More Days					51 or More Days
	Observed Estimate	95% C.I.				Observed Estimate	95% C.I.				Observed Estimate	95% C.I.
RATE ESTIMATES (Percent)
AGE
12-17	11.8	(10.0	-	13.9)		7.0	(5.5	-	8.7)		4.2	(3.1	-	5.7)
18-25	20.5	(17.6	-	23.8)		11.3	(9.2	-	13.8)		7.8	(6.2	-	9.7)
26-34	9.3	(7.5	-	11.6)		4.5	(3.3	-	6.2)		2.6	(1.8	-	3.7)
$35	3.7	(2.9	-	4.8)		2.4	(1.7	-	3.4)		1.6	(1.0	-	2.5)
GENDER
Male	10.1	(8.7	-	11.7)		6.3	(5.2	-	7.7)		4.2	(3.4	-	5.3)
Female	5.4	(4.5	-	6.5)		2.6	(2.0	-	3.3)		1.5	(1.1	-	2.1)
TOTAL	7.6	(6.8	-	8.6)		4.4	(3.8	-	5.1)		2.8	(2.4	-	3.4)

POPULATION ESTIMATES (In Thousands)

AGE
12-17	948	(801	-	1,118)		559	(446	-	699)		338	(247	-	460)
18-25	2,061	(1,764	-	2,393)		1,135	(927	-	1,383)		781	(621	-	977)
26-34	1,135	(906	-	1,413)		551	(400	-	755)		315	(218	-	454)
$35	1,766	(1,372	-	2,268)		1,136	(815	-	1,579)		748	(470	-	1,187)
GENDER
Male	3,730	(3,219	-	4,313)		2,333	(1,909	-	2,843)		1,571	(1,265	-	1,949)
Female	2,180	(1,818	-	2,608)		1,048	(820	-	1,337)		610	(431	-	862)
TOTAL	5,910	(5,249	-	6,646)		3,380	(2,923	-	3,906)		2,182	(1,819	-	2,615)

Table 20H. Frequency of Marijuana Use During Past Year by Age Group and Gender for West Region in 1998

AGE/ /GENDER	At Least Once					12 or More Days					51 or More Days
	Observed Estimate	95% C.I.				Observed Estimate	95% C.I.				Observed Estimate	95% C.I.
RATE ESTIMATES (Percent)
AGE
12-17	15.5	(13.3	-	17.9)		8.3	(6.6	-	10.5)		4.8	(3.6	-	6.4)
18-25	24.9	(22.0	-	28.0)		14.8	(12.4	-	17.5)		9.8	(7.8	-	12.2)
26-34	9.5	(7.3	-	12.3)		4.8	(3.4	-	6.7)		3.9	(2.6	-	5.8)
$35	5.4	(4.2	-	7.0)		3.1	(2.3	-	4.3)		1.7	(1.2	-	2.5)
GENDER
Male	12.1	(10.5	-	13.9)		7.3	(6.0	-	8.7)		4.6	(3.7	-	5.7)
Female	7.6	(6.6	-	8.7)		3.9	(3.2	-	4.7)		2.5	(1.9	-	3.1)
TOTAL	9.8	(8.7	-	11.0)		5.5	(4.8	-	6.4)		3.5	(3.0	-	4.2)

POPULATION ESTIMATES (In Thousands)

AGE
12-17	805	(691	-	934)		433	(341	-	546)		251	(188	-	335)
18-25	1,580	(1,398	-	1,777)		939	(789	-	1,112)		623	(498	-	776)
26-34	752	(577	-	973)		380	(271	-	530)		308	(205	-	459)
$35	1,535	(1,190	-	1,971)		884	(649	-	1,200)		490	(347	-	692)
GENDER
Male	2,843	(2,466	-	3,268)		1,706	(1,414	-	2,052)		1,079	(862	-	1,347)
Female	1,829	(1,593	-	2,098)		930	(766	-	1,126)		594	(464	-	759)
TOTAL	4,672	(4,146	-	5,257)		2,636	(2,291	-	3,029)		1,673	(1,407	-	1,987)

* Low precision; no estimate reported.

NOTE: "At Least Once" is equivalent to "Used Past Year" in Table 3.

Source: Office of Applied Studies, SAMHSA, National Household Survey on Drug Abuse, 1998