Table 5.

Association between energy-adjusted greenhouse gas emissions from diet and background and sociodemographic characteristics for women within the Västerbotten Intervention Programme (n 46 893)^*

Variable	n	Median (kg CO2e/day/4184 kJ)	1st; 3rd quartile (kg CO2e/day/4184 kJ)	R2† (%)	P-value
Age (y)				0·3	<0·001
29–34	635	1·92	1·70; 2·15
35–44	19 702	2·09	1·87; 2·36
45–54	14 296	1·99	1·78; 2·23
55–65	12 260	2·03	1·82; 2·26
BMI, subgroups (kg/m2)				1·5	<0·001
Underweight, <18·5	501	1·95	1·72; 2·20
Normal, 18·5–25·0	23 540	2·02	1·80; 2·25
Overweight, 25·0–30·0	14 917	2·06	1·84; 2·32
Obese, >30·0	7935	2·10	1·87; 2·38
Physical activity				0·1	<0·001
Inactive	8193	2·06	1·83; 2·31
Moderately inactive	13 591	2·02	1·80; 2·27
Moderately active	12 703	2·04	1·82; 2·28
Active	12 200	2·06	1·84; 2·32
Missing value	206	1·97	1·79; 2·25
Marital status				0·1	0·008
Unmarried	3502	2·01	1·78; 2·28
Married/cohabitant	37 762	2·05	1·83; 2·30
Divorced/separated	4275	2·03	1·80; 2·29
Widow/widower	1041	2·02	1·80; 2·25
Missing value	313	2·03	1·82; 2·27
Level of education				0·3	<0·001
Basic level, 9 years	13 533	2·00	1·79; 2·22
High school	15 453	2·07	1·85; 2·33
University	17 619	2·05	1·83; 2·32
Missing value	288	2·03	1·78; 2·31
Smoking				0·2	<0·001
Currently smoking	8343	2·05	1·83; 2·31
Have smoked	14 438	2·06	1·83; 2·32
Do not smoke	23 763	2·03	1·82; 2·28
Missing value	349	2·06	1·82; 2·33
Residence				0·3	<0·001
Urban area	34 860	2·05	1·83; 2·31
Rural area	11 562	2·01	1·79; 2·25
Missing value	471	2·05	1·83; 2·33

CO₂e, carbon dioxide equivalents.

^*Type III tests, based on the General Linear Model procedure, were used to evaluate associations between a priori selected variables and GHGE from diet, given all covariates in the model. GHGE from diet was log transformed to correct for skewness. Study participants who did not have complete information for all covariates were also used in the model.

^†Adjusted.