Table 2.

Age-specific rates of readmissions with 28 days and mortality within 30 days or six months, and over two years of hospital discharge, according to the initial length of stay in hospital in 32 270 alive discharge episodes

	Bottom tertile (n = 10 754)		Middle tertile (n = 10 757)		Top tertile (n = 10 759)
	O/E (n)	O/E ratio	O/E (n)	O/E ratio	O/E (n)	O/E ratio
Readmissions within 28 days
18–49 years: 1 readmission	142/212.6	0.67	156/151.8	1.03	118/51.5	2.29
18–49 years: ≥2 readmissions	9/44.5	0.20	33/31.8	1.04	45/10.8	4.17
50–59 years: 1 readmission	47/96.7	0.49	87/99.5	0.87	117/54.8	2.14
50–59 years: ≥2 readmissions	3/25.1	0.12	16/25.8	0.62	46/14.2	3.24
60–69 years: 1 readmission	46/100.4	0.46	104/122.5	0.85	167/94.0	1.78
60–69 years: ≥2 readmissions	2/35.5	0.06	20/43.3	0.46	90/33.2	2.71
70–79 years: 1 readmission	51/129.2	0.39	97/164.6	0.59	337/191.2	1.76
70–79 years: ≥2 readmissions	3/54.1	0.06	24/68.9	0.35	176/80.0	2.20
≥80 years: 1 readmission	93/229.9	0.40	197/286.1	0.69	907/680.9	1.33
≥80 years: ≥2 readmissions	9/113.1	0.08	45/140.8	0.32	535/335.1	1.60
Died within 30 days
18–49 years	2/7.7	0.26	2/5.5	0.36	11/1.9	5.79
50–59 years	5/11.2	0.45	6/11.5	0.52	18/6.3	2.86
60–69 years	12/26.6	0.45	21/32.5	0.65	51/24.9	2.05
70–79 years	22/47.2	0.47	32/60.1	0.53	123/69.8	1.76
≥80 years	43/101.6	0.42	62/126.5	0.49	424/300.9	1.41
Died within six months
18–49 years	9/22.5	0.40	9/16.1	0.56	26/5.5	4.73
50–59 years	14/33.5	0.42	19/34.5	0.55	54/19.0	2.84
60–69 years	32/71.6	0.45	47/87.4	0.54	147/67.1	2.19
70–79 years	62/124.2	0.50	89/158.1	0.56	315/183.7	1.71
≥80 years	146/263.0	0.56	215/327.2	0.66	1008/778.8	1.29
Died over two years
18–49 years	22/37.3	0.59	14/26.6	0.53	37/9.0	4.11
50–59 years	25/52.8	0.47	32/54.3	0.59	80/29.9	2.68
60–69 years	46/102.0	0.45	80/124.5	0.64	196/95.5	2.05
70–79 years	114/199.1	0.57	152/253.5	0.60	481/294.5	1.63
≥80 years	256/389.2	0.66	351/484.3	0.72	1419/1152.5	1.23

O/E, observed/expected.