Co-creating a local environmental epidemiology study: the case of citizen science for investigating air pollution and related health risks in Barcelona, Spain

Table 3 Descriptive summary of the perceived situations where pollution affects the most (Q4), perceived vulnerable population groups to air pollution (Q5) and health topic of interest for more investigation (Q6) (N respondents = 488)

Questions^a	Answers	n	% of responses^b	% of cases^c
Q4: In which situations do you perceive that air pollution affects you the most?	While walking in the street	370	32.51	75.82
	While going by bicycle	213	18.72	43.65
	While walking with children	150	13.18	30.74
	While doing outdoor sports	144	12.65	29.51
	While traveling by metro	106	9.31	21.72
	When I am at home	79	6.94	16.19
	When I drive	48	4.22	9.84
	When I am at work	15	1.32	3.07
	Other	13	1.14	2.66
	Total	1138	100	233.20
Q5: Are you worried about how air pollution affects any of these groups?	Children	388	28.87	79.51
	Elderly people	225	16.74	46.11
	People with asthma or respiratory problems	220	16.37	45.08
	Pregnant women	186	13.84	38.11
	Pedestrians	131	9.75	26.84
	People with allergies	91	6.77	18.65
	Deliverymen using motorbike	41	3.05	8.40
	Sportsmen/women	29	2.16	5.94
	Other	19	1.41	3.89
	Students	14	1.04	2.87
	Total	1344	100	275.41
Q6: You would like to know how air pollution affects …	Respiratory system	337	24.16	69.06
	Concentration and development	191	13.69	39.14
	Heart and arteries	173	12.40	35.45
	Stress	167	11.97	34.22
	Mental health	123	8.82	25.20
	Ageing	121	8.67	24.80
	Fertility / Reproductive system	75	5.38	15.37
	Allergies	70	5.02	14.34
	Digestive system	52	3.73	10.66
	Hair / Skin	42	3.01	8.61
	Sport performance	33	2.37	6.76
	Other	11	0.79	2.25
	Total	1395	100	285.86

^aQ4, Q5 and Q6 have no missing cases
^bThe “% of responses” column reports percentages with respect to the overall sum of responses. For example, 32.51% of all responses of Q4 are “When walking in the street”
^cThe “% of cases” column reflects the average number of responses per respondent (multiplied by 100). For example, 69% of the respondents selected “Respiratory system”

ISSN: 1476-069X