Table 3.28

Estimated odds ratios for the proportion of current cigarette smokers who have saliva cotinine levels at or above the 75th percentile^b

 

Aged 16 and over currently smoking cigarettes					1998
Independent variables	Men			Women
	N	Odds ratioa	95% CI	N	Odds ratioa	95% CI
Age		p=0.0000			p=0.0000
16-24	177	0.43	0.27 - 0.68	198	0.37	0.24 - 0.58
25-34	291	0.72	0.52 - 0.98	311	0.89	0.67 - 1.19
35-44	248	1.53	1.15 - 2.02	284	1.58	1.21 - 2.06
45-54	213	1.63	1.22 - 2.18	208	1.33	0.99 - 1.81
55 and over	242	1.32	0.98 - 1.77	254	1.42	1.05 - 1.92
Social class of head of household		p=0.9317			p=0.5819
I	39	0.79	0.33 - 1.86	48	0.86	0.40 - 1.85
II	274	1.05	0.73 - 1.50	283	0.84	0.60 - 1.20
IINM	102	1.27	0.78 - 2.06	207	1.08	0.77 - 1.53
IIM	441	1.05	0.78 - 1.40	358	1.06	0.79 - 1.42
IV	221	0.92	0.64 - 1.33	262	1.30	0.94 - 1.79
V	94	0.99	0.61 - 1.59	97	0.92	0.58 - 1.47
Equivalised household income quintile		p=0.2685			p=0.2500
Bottom quintile	224	1.12	0.82 - 1.52	283	1.28	0.96 - 1.72
Second quintile	195	1.33	0.99 - 1.80	233	0.86	0.64 - 1.15
Middle quintile	278	0.91	0.69 - 1.20	314	0.83	0.64 - 1.09
Fourth quintile	268	0.80	0.59 - 1.07	239	1.03	0.75 - 1.41
Top quintile	206	0.93	0.65 - 1.32	186	1.06	0.72 - 1.56
Health Authority area type		p=0.7244			p=0.3560
Inner London	39	0.69	0.29 - 1.61	55	1.34	0.75 - 2.39
Mining & Industrial	213	0.92	0.65 - 1.31	218	0.98	0.72 - 1.35
Urban Centres	151	1.02	0.68 - 1.51	199	0.71	0.51 - 1.00
Mature	158	1.16	0.79 - 1.72	158	0.89	0.60 - 1.31
Prosperous	328	1.06	0.77 - 1.46	343	1.16	0.88 - 1.53
Rural	282	1.26	0.91 - 1.73	282	1.03	0.77 - 1.39
Level of educational qualification		p=0.2651			p=0.0136
Degree/NVQ 4,5	115	0.77	0.49 - 1.22	88	0.55	0.29 - 1.01
A level/NVQ 3	283	0.91	0.67 - 1.24	212	0.86	0.59 - 1.25
O level/NVQ 1,2	419	1.07	0.82 - 1.38	522	1.56	1.17 - 2.08
No qualifications	354	1.33	1.00 - 1.78	433	1.36	0.99 - 1.88
Number of cigarettes smoked per day		p=0.0000			p=0.0000
Less than 10	277	0.31	0.21 - 0.45	371	0.31	0.24 - 0.42
10 up to less than 20	445	1.25	0.98 - 1.60	532	1.20	0.98 - 1.47
20 or more	449	2.59	2.04 - 3.29	352	2.66	2.15 - 3.28
Type of cigarettes smoked		p=0.0201			p=0.0069
Roll-ups	294	1.48	1.13 - 1.92	77	1.24	0.81 - 1.89
10+ mg/cigarette tar	550	0.91	0.72 - 1.16	570	1.34	1.05 - 1.70
<10 mg/cigarette tar	233	0.79	0.57 - 1.10	477	0.79	0.61 - 1.03
Unknownc	94	0.94	0.62 - 1.42	131	0.76	0.52 - 1.11

^a Odds ratios are relative to average, not to a designated reference category.

^b 75th percentile saliva cotinine levels for cigarette smokers were 431.5 ng/ml for men and 369.0 ng/ml for women.

^c Unknown includes cigarettes where the informant did not know the brand name, where there was not enough information given to determine the brand of cigarette, imported brands, or where the brand was not analysed by the Laboratory of Government Chemists.

We welcome your comments on this site. Prepared 22 December 1999