Table S2.

IRR for pneumonia after burn injury occurred

	No. of pneumonia event	Observed person-days	IRR	95% CI
Baseline period	202	193,401	1
Exposure period (days)
≤30	15	4,699	2.76*	1.63–4.69
31–60	8	4,594	1.51	0.74–3.07
61–90	9	4,445	1.79	0.92–3.50

Note:

^*P<0.001.

Abbreviation: IRR, incidence rate ratio.