Table 4.

Risk of CC ≥1 year after salmonellosis, by age group at infection and serotype

	CC (overall)	Proximal colon	Distal colon
	HR (95% CI)a	HR (95% CI)a	HR (95% CI)a
Salmonella (total)
Unexposed	ref	ref	ref
<50 years	1.10 (0.84–1.45)	1.07 (0.72–1.60)	1.12 (0.76–1.63)
50–59 years	0.91 (0.71–1.16)	1.02 (0.74–1.42)	0.77 (0.53–1.13)
60–69 years	0.95 (0.75–1.20)	1.08 (0.80–1.45)	0.80 (0.55–1.17)
70–79 years	1.11 (0.84–1.47)	1.22 (0.86–1.73)	0.92 (0.58–1.47)
≥80 years	0.91 (0.50–1.65)	1.13 (0.56–2.26)	0.57 (0.18–1.77)
Salmonella Enteritidis
Unexposed	ref	ref	ref
<50 years	0.90 (0.60–1.36)	0.91 (0.50–1.64)	0.89 (0.51–1.57)
50–59 years	0.90 (0.65–1.26)	0.87 (0.54–1.39)	0.93 (0.58–1.47)
60–69 years	1.08 (0.80–1.46)	1.08 (0.72–1.61)	1.06 (0.68–1.67)
70–79 years	1.27 (0.89–1.82)	1.31 (0.83–2.09)	1.15 (0.65–2.02)
≥80 years	1.03 (0.46–2.30)	1.19 (0.44–3.19)	0.76 (0.19–3.09)
Salmonella Typhimurium
Unexposed	ref	ref	ref
<50 years	1.16 (0.67–2.00)	1.47 (0.74–2.95)	0.86 (0.36–2.07)
50–59 years	0.88 (0.51–1.52)	1.08 (0.54–2.16)	0.67 (0.28–1.62)
60–69 years	0.51 (0.27–0.99)	0.63 (0.28–1.41)	0.36 (0.12–1.13)
70–79 years	0.52 (0.23–1.16)	0.59 (0.22–1.57)	0.41 (0.10–1.65)
≥80 years	0.64 (0.16–2.58)	1.06 (0.27–4.28)	–
Other Salmonella serovars
Unexposed	ref	ref	ref
<50 years	1.52 (0.91–2.52)	1.00 (0.42–2.41)	2.00 (1.08–3.73)*
50–59 years	0.93 (0.56–1.54)	1.33 (0.73–2.40)	0.50 (0.19–1.32)
60–69 years	1.08 (0.68–1.71)	1.54 (0.91–2.61)	0.64 (0.27–1.54)
70–79 years	1.43 (0.85–2.42)	1.73 (0.93–3.23)	0.95 (0.36–2.55)
≥80 years	0.94 (0.30–2.93)	1.06 (0.26–4.24)	0.73 (0.10–5.22)

HR, hazard ratio; ref, reference.

^aAdjusted for sex, year of birth, geographical region, IBD status and marital status.

*P-value <0.05; **P-value <0.01; ***P-value <0.001.