Investigation And Analysis Of The Prevalence Revalence Of Pulmonary Nodules And The Level Distribution Of Lung Segments In 332386 Patients With First Chest LDCT

Objective: In order to study the population characteristics of the prevalence of pulmonary nodules in the first LDCT population and the distribution of pulmonary nodules at the level of lung segments,this epidemiological survey was conducted to provide research data for improving the efficiency of diagnosis and treatment of pulmonary nodules.Methods: The CT report results of patients who underwent chest LDLCT at XXX from September 17,2016 to December 7,2021 were collected retrospectively.The subjects included(1)were ≥ 18 years old;(2)Chest lowdose spiral CT(LDCT)was used for examination.Those who used LDCT for many times were selected from the results of the first chest CT examination in our hospital for statistics.By extracting the information from the chest CT report,the imaging characteristics and distribution characteristics of the pulmonary nodules of the study object were obtained.Results: Among 332386 first-time chest LDCT patients,the average age was53.4 ± 14.7 years old,with a total of 180535 males and 151851 females.A total of 257737 patients were found with one or more pulmonary nodules,including 139400 males and 118337 females.The incidence rate of pulmonary nodules was 77.5%(257735/332386);The incidence of pulmonary nodules in the male and female populations was(77.2% vs 77.9%),with P=0.624>0.05.There was no statistically significant difference in the incidence of pulmonary nodules between the male and female populations;The incidence rate of pulmonary nodules(5-10mm)increases with age.The age group ≤ 40 years old has the lowest incidence rate of 7.2%,and the age group ≥ 71 years old has the highest incidence rate of 12.4%.In all age groups,the incidence rate of pulmonary nodules in the age groups 61-70 years old and ≥ 71 years old is generally higher in men than in women,but in the age group 41-50 years old,the prevalence rate of female pulmonary nodules is 8.7%,the prevalence rate of male pulmonary nodules is 8.3%,and the prevalence rate of female pulmonary nodules is higher than that of men,P<0.05,the difference is statistically significant;The incidence of 10-30 mm pulmonary nodules increases with age;The distribution of 5-30 mm pulmonary nodules at the level of 18 lung segments was investigated.It was found that the incidence rate of the upper lobe tip posterior segment of the left lung was the highest(15.0%),and the lower tongue segment of the upper lobe of the left lung was the lowest(0.7%),P<0.05,with a statistically significant difference.Extracting the location and pathology of pulmonary nodules(5-30mm)from 2000 surgical patients,the results showed that the malignant rate of each segment of the upper lobe of both lungs was higher than that of the other segments,with a P value of<0.05,and the difference was statistically significant.Conclusions: Pulmonary nodules are often detected in the chest LDCT.In332386 people who first examined the chest LDCT,the total incidence rate of pulmonary nodules was 77.5%,and the incidence rate of 5-30 mm pulmonary nodules was 13.2%.Overall,the prevalence of 5-10 mm pulmonary nodules,5-30 mm pulmonary nodules,and 5-30 mm pulmonary nodules in various age groups is generally higher in males than in females,but the prevalence of pulmonary nodules in the age group of 41 to 50 years is higher in females than in males.The incidence rate of pulmonary nodules increases with age,and the prevalence of 5-10 mm pulmonary nodules,5-30 mm pulmonary nodules,and 5-30 mm pulmonary nodules is the highest in the age group ≥71 years old.Pulmonary nodules ranging from 5-30 mm are most common in the posterior segment of the left upper lobe,followed by three segments of the right upper lobe.