TABLE 3.

Prevalence of K. kingae in the respiratory tract by age group and study period

Age (yr)	Total				February-May				October-December				Pb
	n	No. positive	% Positive	RRa	n	No. positive	% Positive	RR	n	No. positive	% Positive	RR
0-3	694	22	3.2c	1.0	346	15	4.3d,e	1.0	348	7	2.0	1.0	0.13
4-17	679	10	1.5	0.46	339	4	1.2d	0.26	340	6	1.8	0.88	0.76
≥18	671	5	0.8c	0.23	335	2	0.6e	0.13	336	3	0.9	0.44	0.99
Total	2,044	37	1.8		1,020	21	2.1		1,024	16	1.6		0.50
P for trend			0.0008				0.0006				0.24

^aRR, relative risk.

^bSignificance of the differences in the prevalence rates found in each age group between the two study periods.

^cP = 0.003.

^dP = 0.022.

^eP = 0.004.