The outcome and the influencing factors of the age of onset in post-mortem of chronic bronchitis patients: a retrospective study

Figures & data

Table 1 The relationship between patient history and the age of onset

	Group I, mean ± SD	Group II, mean ± SD	p-value
Course of chronic cough and sputum (years)	33.38±7.73	14.44±8.60	0.000
Age of death (years)	77.65±7.87	84.69±6.67	0.000
Hugh Jones Index	3.84±0.87	3.55±0.69	0.002
The correlation between the number of hospital admissions per year and the age of onset	r^2=−0.146		0.000

Table 2 Smoking history according to the age of onset

	Group I	Group II	p-value
Smoking patients (total patients) n (N)	35 (63)	198 (495)	0.018
Daily smoking counta	23.71±11.84	22.18±10.41	0.431
Duration of smokinga	39.86±13.09	39.51±12.22	0.880
Total smoking count (cigarettes×years)a	982.35±617.16	862.89±467.05	0.288

Notes:

a Accessed for smoking patients. Data presented as mean ± SD unless otherwise indicated. N is a total number of patients.

Figure 1 The correlation between smoking history and the age of onset.

Notes: (A) The age of onset showed no relationship with smoking duration, p>0.05; (B) the age of onset and daily smoking count were negatively correlated, r=−0.210 (p<0.05); (C) the age of onset and total smoking counts were negatively correlated, r=−0.146 (p<0.05).

Figure 2 The relationship between the incidence of self-comorbidities and the age of onset.

Abbreviation: M–H, Mantel–Haenszel.

Figure 3 The relationship between cause of death and the age of onset.

Abbreviations: M–H, Mantel–Haenszel; MODS, imultiple organ dysfunction syndrome.

Figure 4 The mortality between the two groups as a function of the age of onset.