Table 1

Demographic characteristics of TAHS participants, stratified by history of childhood pneumonia/pleurisy

Characteristics in childhood and middle ageDoctor-diagnosed childhood pneumonia/pleurisy (n=8254)*
NeverOnce or twiceMore than twice
At age 7
Childhood pneumonia/pleurisy, n (%)* 7082 (86)1048 (13)124 (1.5)
Demographics
 Age, years (SD)6.50 (0.29)6.52 (0.28)6.56 (0.28)
 Sex (male)3567 (50)582 (56)62 (50)
Rurality of primary school
 Inner regional Australia4095 (59)625 (61)72 (61)
 Outer regional Australia2659 (38)369 (36)44 (37)
 Remote Australia122 (2)20 (2)2 (2)
 Very remote Australia104 (1)10 (1)1 (1)
Paternal occupation (ASCO)
 Managers/professionals1415 (21)188 (20)13 (12)
 Associated professionals436 (7)57 (6)7 (6)
 Tradespersons and advanced clerical1973 (30)288 (30)29 (26)
 Intermediate clerical and production1865 (28)279 (29)38 (34)
 Elementary clerical, labourers and related workers938 (14)149 (16)26 (23)
Infant feeding
 Breast only2763 (40)356 (35)47 (40)
 Bottle only1953 (28)320 (32)37 (31)
 Breast and bottle feeding2213 (32)340 (33)35 (29)
Parental smoking at age 7 years, n (%)
 Maternal smoking4310 (63)448 (44)56 (47)
 Paternal smoking4115 (61)633 (65)93 (79)
Respiratory symptoms in preceding 12 months
 Asthma/wheezy breathing598 (8.4)231 (22)58 (47)
 Recurrent childhood bronchitis1840 (27)500 (50)91 (75)
At age 45
Childhood pneumonia/pleurisy, n (%)* 1130 (82)225 (16)26 (1.9)
% weighted back to 1968 survey85.612.91.5
Demographics
 Age, years (SD)44.9 (0.8)44.8 (0.8)44.9 (1.0)
 Sex, n (%) (male)559 (49)129 (57)14 (54)
Current smoking status
 Current smoker, n (%)323 (29)55 (25)8 (30)
 Pack-years, median (IQR)21 (12–29)23 (13–33)23 (18–28)
Current respiratory symptoms last 12 months
 Asthma/wheezy breathing344 (25)69 (25)15 (40)
 Chronic bronchitis279 (6)53 (8)8 (11)
At age 53
Childhood pneumonia/pleurisy, n (%)* 2967 (87)409 (12)51 (1.5)
Demographics
 Age, years (SD)53.0 (1.0)53.1 (0.9)53.1 (0.9)
 Sex, n (%) (male)1414 (48)232 (57)28 (55)
Current smoking status
 Current smoker, n (%)525 (17)70 (17)12 (22)
 Pack-years, median (IQR)24 (13–36)25 (10–38)32 (18–40)
Current respiratory symptoms last 12 months
 Asthma/wheezy breathing323 (11)56 (13)4 (13)
 Chronic bronchitis150 (5)25 (6)2 (4)
  • *Total percentages are within columns except where percentages across columns total 100% as indicated.

  • ASCO, Australian Standard Classification of Occupations; TAHS, Tasmanian Longitudinal Health Study.