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Table 4 Characteristics of participants with screen-detected lung cancer (LC) and with nonscreen-detected LC

From: A population-based cohort study of chest x-ray screening in smokers: lung cancer detection findings and follow-up

 

Participants with LC

 
 

Screen-detected

(n = 34)

Nonscreen-detected

(n = 33)

P

Age, median (IQR)

66 (60-71)

69 (59-72)

0.965

Male/female (ratio)

30/4 (7.5)

30/3 (10)

0.721

Pack-years, median (IQR)

55 (39-77)a

46 (33-76)b

0.200

Histologically confirmed LC, n (%)

34 (100%)

29 (88%)

0.036

   Adenocarcinoma, n (%)

11 (32%)

6 (21%)

 

   Squamous cell carcinoma, n (%)

16 (47%)

12 (41%)

0.618

   Other NSCLC, n (%)

3 (9%)

4 (14%)

 

   SCLC, n (%)

4 (12%)

7 (24%)

 

Stage of LC at diagnosis c

   

   I, n (%)

18 (53%)

3 (9%)

 

   II, n (%)

2 (6%)

1 (3%)

 

   IIIA, n (%)

5 (15%)

4 (12%)

< 0.0001

   IIIB-IV and extensive SCLC, n (%)

7 (21%)

25 (76%)

 

   Indeterminate, n (%)*

2 (6%)

0

 

Follow-up months, median (range) d

100 (49-161)

72 and 98e

-

  1. LC: lung cancer; IQR: interquartile range; NSCLC: non-small cell lung cancer; SCLC: small cell lung cancer
  2. aNot available: 2 patients
  3. bNot available: 3 patients
  4. cNot available in 1 Nonscreen-detected Participant
  5. *Patient refused to ascertain stage
  6. dCalculated in survivors at end of study
  7. eOnly two survivors