Table 2.

Resource use and cost (AU$) per patient per year

	Ig (n = 21), mean (SD)	Antibiotics (n = 42), mean (SD)	Mean difference (95% CI)
Resource use per patient per year (12-mo follow-up)
Hospital ward admissions	0.48 (0.68)	0.48 (0.92)	0 (–0.45 to 0.45)
ED admissions	0.24 (0.62)	0.17 (0.44)	0.07 (–0.20 to 0.34)
ICU admissions	0.05 (0.22)	0 (0)	0.05 (–0.02 to 0.11)
Length of hospital stay,∗ d	3.24 (4.10)	4.24 (7.10)	–1 (–4.35 to 2.35)
Day procedures	0.09 (0.44)	0.07 (0.35)	0.02 (–0.18 to 0.22)
Specialist consultations	0.05 (0.22)	0.05 (0.31)	0 (–0.15 to 0.15)
GP visits	1.90 (1.48)	1.71 (1.07)	0.19 (–0.46 to 0.84)
Investigations (out-of-hospital)	0.57 (0.87)	0.50 (1.13)	0.07 (–0.49 to 0.63)
Antimicrobials (excluding IV)	2.95 (2.13)	2.07 (2.57)	0.88 (–0.42 to 2.18)
Cost per patient per year (12-mo follow-up)
In-hospital costs
Hospital ward	$8 637 (10 984)	$11 473 (19 225)	–$2 836 (–11 905 to 6 233)
ED	$221 (581)	$155 (406)	$66 (–185 to 318)
ICU	$279 (1 277)	$0 (0)	$279 (–112 to 669)
Day procedures	$217 (993)	$162 (777)	$54 (–402 to 511)
Total in-hospital costs	$9 354 (11 436)	$11 791 (19 159)	–$2 436 (–11 532 to 6 657)
Out-of-hospital costs
Specialist consultations	$8 (35)	$8 (50)	$0 (–24 to 24)
GP visits	$111 (86)	$100 (62)	$11 (–27 to 49)
Investigations (out-of-hospital)	$21 (32)	$19 (42)	$2 (–18 to 23)
Antimicrobials (excluding IV)	$128 (161)	$98 (190)	$30 (–67 to 127)
Total out-of-hospital costs	$268 (211)	$224 (224)	$44 (–74 to 161)
Prophylactic treatment (Ig or antibiotics)	$37 331 (16 493)	$5 798 (11 635)	$31 533 (24 360-38 707)
Total cost	$46 953 (18 626)	$17 813 (27 173)	$29 140 (15 940-42 334)

All costs in AU$ (2023).

ED, emergency department; GP, general practitioner; ICU, intensive care unit.

^∗ICU and ward.