Table 4.

Relative rate of bacteraemic pneumococcal disease adjusted for neighbourhood characteristics in metropolitan Philadelphia, 2005–2008

Effects	Unadjusted RR	95% CI	Adjusted RR	95% CI
Density (100 00 people/mile2 increase)	1·29	(1·18–1·41)	1·10	(1·00–1·19)
% population black (10% increase*)	1·08	(1·07–1·11)	1·07	(1·04–1·09)
% population aged <5 years (10% increase*)	3·36	(2·09–5·56)	3·49	(1·80–5·18)
% population aged ⩾65 years (10% increase*)	0·94	(0·79–1·13)	1·19	(1·00–1·38)

RR, Relative rate; CI, confidence interval.

^*10% increase in the percent of the population with each characteristic.