The spatial–temporal effect of air pollution on individuals’ reported health and its variation by ethnic groups in the United Kingdom: a multilevel longitudinal analysis

Table 4 Intraclass correlation coefficient for within individual and household clusters

		General Health scale (1 to 5: excellent to poor)
Individual ID	ICC [95%CI]	*0.65 [0.64, 0.65]*
	N of observations	404,264
	N of individuals	67,982
	Mean^a (SD)	2.65 (0.36)
Household ID	ICC [95%CI]	0.24 [0.24, 0.24]
	N of observations	404,264
	N of households	233,212

Strong ICCs > 0.3 are highlighted in italic-bold; Mean^a is based on predictions from mixed-effects linear models which are adjusted for age in fixed effects and for the individual ID in random intercept

ISSN: 1471-2458