Epidemiological and clinical characteristics of older adults with burns: a 15-year retrospective analysis of 2554 cases in Wuhan Institute of Burns

Table 3 Comparison of pre-injury diseases stratified per age category

Age categories(years)	Total (N = 1429)	60–69 (n = 796)	70–79 (n = 406)	80+ (n = 227)	x²	P value
Hypertension	512 (38.5%)	252 (31.7%)	153 (37.7%)	107 (47.1%)^a	19.254	< 0.001
Heart disease	170 (11.9%)	71 (8.9%)	49 (12.1%)^f	50 (22.0%)^b	28.966	< 0.001
Diabetes	199 (13.9%)	104 (13.1%)	71 (17.5%)^g	24 (10.6%)	6.918	0.031
Cerebral infarction	123 (8.6%)	51 (6.4%)	34 (8.4%)^h	38 (16.7%)^c	24.013	< 0.001
Pulmonary disease	51 (3.6%)	21 (2.6%)	14 (3.4%)	16 (7.0%)^d	10.006	0.007
Alzheimer’s disease	30 (2.1%)	8 (1.0%)	10 (2.5%)	12 (5.3%)^e	16.117	< 0.001

Bonferroni correction was applied to the P values for multiple comparisons between groups
^a 60-69y vs 80 + y, P < 0.001; ^b 60-69y vs 80 + y, P < 0.001; ^c 60-69y vs 80 + y, P < 0.001; ^d 60-69y vs 80 + y, P = 0.006; ^e 60-69y vs 80 + y, P < 0.001; ^f 70-79y vs 80 + y, P = 0.003; ^g 70-79y vs 80 + y, P = 0.019; ^h 70-79y vs 80 + y, P = 0.003

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