Table 1

 Characteristics of lung cancer cases and matched controls

CharacteristicCases n = 247Controls n = 1235
*Values shown as number (%).
†Values shown as median (interquartile range).
Age at diagnosis*
    <6035 (14)178 (14)
    60–6960 (24)310 (25)
    70–79118 (48)575 (47)
    80+34 (14)174 (14)
Male sex*170 (69)850 (69)
Number of consultations per patient†
    In the 2 years before diagnosis16 (9–24)10 (5–17)
    Excluding the last 180 days before diagnosis9 (3–14)8 (4–13)
Number of ICPC codes per patient†
    In the 2 years before diagnosis34 (21–54)20 (10–34)
    Excluding the last 180 days before diagnosis15 (6–31)14 (7–26)