Table 2. Crude rates of ED visits and hospitalizations per 1,000 singleton live birth for respiratory health services from birth to 5 years in Alberta.

	Total		Reference group		Moderate/late PTB		Very/extremely PTB		SGA at term		LGA at term
	Events	Rate	Events	Rate	Events	Rate	Events	Rate	Events	Rate	Events	Rate
ED visits
URTI	150,551	741.3	109,076	728.4	12,935	815.5	2,261	727.7	11,264	693.6	15,015	828.0
Croup	33,072	162.8	23,819	159.1	3,031	191.1	588	189.3	2,195	135.2	3,439	189.6
Asthma	25,593	126.0	17,718	118.3	2,841	179.1	829	266.8	2,025	124.7	2,180	120.2
Pneumonia	22,342	110.0	15,419	103.0	2,417	152.4	831	267.5	1,651	101.7	2,024	111.6
Bronchiolitis	19,302	95.0	13,075	87.3	2,396	151.1	618	198.9	1,414	87.1	1,799	99.2
Bronchitis	14,015	69.0	10,098	67.4	1,264	79.7	311	100.1	923	56.8	1,419	78.3
Influenza	6,858	33.8	4,956	33.1	655	41.3	98	31.5	517	31.8	632	34.9
LRTI	4,560	22.5	3,171	21.2	475	29.9	93	29.9	371	22.8	450	24.8
Hospitalizations
Bronchiolitis	5,109	25.2	3188	21.3	754	47.5	303	97.5	387	23.8	477	26.3
Pneumonia	4,906	24.2	3175	21.2	612	38.6	336	108.1	358	22.0	425	23.4
Asthma	2,984	14.7	1962	13.1	385	24.3	181	58.3	232	14.3	224	12.4
URTI	2,212	10.9	1451	9.7	292	18.4	108	34.8	198	12.2	163	9.0
Croup	993	4.9	677	4.5	100	6.3	49	15.8	63	3.9	104	5.7
LRTI	493	2.4	288	1.9	71	4.5	53	17.1	40	2.5	41	2.3
Influenza	478	2.4	292	2.0	60	3.8	39	12.6	42	2.6	45	2.5
Bronchitis	296	1.5	181	1.2	34	2.1	10	3.2	25	1.5	46	2.5

Reference group = appropriate-for-gestational age infants born at term; LGA = large for gestational age; LRTI = lower respiratory tract infections; URTI = upper respiratory tract infections; PTB = preterm birth; SGA small for gestational age.