Table 3.

Hospitalization Rate¹ by Primary Organ and Disease System Category during Study Period, 1999–2007

Cause of Hospitalization	All periods	1999–2001	2002–2004	2005–2007	Relative Rate2 (95% CI)	p-value3
Cancer
Patients hospitalized	33	9	14	13
Total hospitalizations	68	11	30	27	1.50 (0.98–2.29)	0.06
Rate	5.3 (4.1–6.7)	2.6 (1.4–4.6)	6.6 (4.5–9.5)	6.6 (4.5–9.6)
AIDS-Defining Cancers
Patients hospitalized	12	2	8	3
Total hospitalizations	30	3	19	8	1.10 (0.92–1.32)	0.31
Rate	2.3 (1.6–3.3)	0.7 (0.2–2.2)	4.2 (2.7–6.6)	1.9 (1.0–3.9)
Non-AIDS Defining Cancers
Patients hospitalized	23	7	7	10
Total hospitalizations	38	8	11	19	1.18 (0.96–1.44)	0.24
Rate	2.9 (2.1–4.0)	1.9 (0.9–3.7)	2.4 (1.3–4.4)	4.6 (2.9–7.2)
Cardiovascular
Patients hospitalized	103	31	43	44
Total hospitalizations	155	36	66	53	1.24 (0.99–1.55)	0.06
Rate	12.0 (10.2–14.0)	8.4 (6.0–11.6)	14.6 (11.5–18.6)	12.9 (9.8–16.9)
Gastrointestinal
Patients hospitalized	201	68	87	74
Total hospitalizations	307	82	129	96	1.14 (0.97–1.33)	0.11
Rate	23.8 (21.3–26.6)	19.0 (15.3–23.6)	28.7 (24.2–34.1)	23.3 (19.1–28.5)
Genitourinary
Patients hospitalized	56	22	21	17
Total hospitalizations	65	23	25	17	0.89 (0.66–1.20)	0.45
Rate	5.0 (3.9–6.4)	5.3 (3.5–8.0)	5.5 (3.7–8.2)	4.1 (2.6–6.7)
Musculoskeletal
Patients hospitalized	113	35	42	44
Total hospitalizations	135	39	44	52	1.19 (0.94–1.50)	0.15
Rate	10.3 (8.7–12.3)	9.1 (6.6–12.4)	9.5 (7.0–12.8)	12.6 (9.6–16.6)
Neurological
Patients hospitalized	78	32	30	19
Total hospitalizations	94	40	33	21	0.75 (0.57–1.01)	0.05
Rate	7.3 (5.9–8.9)	9.3 (6.8–12.7)	7.3 (5.2–10.3)	5.1 (3.3–7.8)
Psychological
Patients hospitalized	89	45	31	19
Total hospitalizations	121	62	38	21	0.60 (0.46–0.77)	<0.01
Rate	9.3 (7.8–11.2)	14.4 (11.2–18.5)	8.4 (6.1–11.5)	5.1 (3.3–7.8)
Respiratory
Patients hospitalized	158	65	63	46
Total hospitalizations	205	76	77	52	0.88 (0.73,1.05)	0.16
Rate	15.8 (13.8–18.2)	17.6 (14.1–22.1)	17.0 (13.6–21.3)	12.6 (9.6–16.6)
Bacterial
Patients hospitalized	165	49	70	62
Total hospitalizations	231	63	89	79	1.17 (0.96–1.42)	0.13
Rate	17.8 (15.7–20.3)	14.6 (11.4–18.7)	19.7 (16.0–24.2)	19.2 (15.4–24.0)
Viral
Patients hospitalized	66	36	21	17
Total hospitalizations	86	40	29	17	0.67 (0.50–0.90)	<0.01
Rate	6.6 (5.4–8.2)	9.3 (6.8–12.7)	6.4 (4.5–9.2)	4.1 (2.6–6.7)
Fungal
Patients hospitalized	42	21	12	12
Total hospitalizations	62	30	17	15	0.73 (0.48–1.10)	0.13
Rate	4.8 (3.7–6.1)	7.0 (4.9–10.0)	3.8 (2.3–6.0)	3.6 (2.2–6.1)
Other
Patients hospitalized	185	71	72	56
Total hospitalizations	241	85	91	65	0.91 (0.78–1.07)	0.27
Rate	18.6 (16.4–21.1)	19.7 (16.0–24.4)	20.1 (16.4–24.7)	15.8 (12.4–20.2)
Any Reason
Patients hospitalized	822	376	383	337
Total hospitalizations	1770	587	668	515	0.99 (0.92–1.07)	0.88
Rate	136.7 (130.5–143.2)	136.3 (125.7–147.8)	147.5 (136.8–159.2)	125.2 (114.9–136.5)

¹Rates presented are unadjusted and are per 1,000 person-years

²RR are estimated changes from one time interval to the next

³P-values from test for trends using 1 degree of freedom