Demographic characteristics of TAHS participants, stratified by history of childhood pneumonia/pleurisy
| Characteristics in childhood and middle age | Doctor-diagnosed childhood pneumonia/pleurisy (n=8254)* | ||
| Never | Once or twice | More 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 Australia | 4095 (59) | 625 (61) | 72 (61) |
| Outer regional Australia | 2659 (38) | 369 (36) | 44 (37) |
| Remote Australia | 122 (2) | 20 (2) | 2 (2) |
| Very remote Australia | 104 (1) | 10 (1) | 1 (1) |
| Paternal occupation (ASCO) | |||
| Managers/professionals | 1415 (21) | 188 (20) | 13 (12) |
| Associated professionals | 436 (7) | 57 (6) | 7 (6) |
| Tradespersons and advanced clerical | 1973 (30) | 288 (30) | 29 (26) |
| Intermediate clerical and production | 1865 (28) | 279 (29) | 38 (34) |
| Elementary clerical, labourers and related workers | 938 (14) | 149 (16) | 26 (23) |
| Infant feeding | |||
| Breast only | 2763 (40) | 356 (35) | 47 (40) |
| Bottle only | 1953 (28) | 320 (32) | 37 (31) |
| Breast and bottle feeding | 2213 (32) | 340 (33) | 35 (29) |
| Parental smoking at age 7 years, n (%) | |||
| Maternal smoking | 4310 (63) | 448 (44) | 56 (47) |
| Paternal smoking | 4115 (61) | 633 (65) | 93 (79) |
| Respiratory symptoms in preceding 12 months | |||
| Asthma/wheezy breathing | 598 (8.4) | 231 (22) | 58 (47) |
| Recurrent childhood bronchitis | 1840 (27) | 500 (50) | 91 (75) |
| At age 45 | |||
| Childhood pneumonia/pleurisy, n (%)* | 1130 (82) | 225 (16) | 26 (1.9) |
| % weighted back to 1968 survey | 85.6 | 12.9 | 1.5 |
| 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 breathing | 344 (25) | 69 (25) | 15 (40) |
| Chronic bronchitis | 279 (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 breathing | 323 (11) | 56 (13) | 4 (13) |
| Chronic bronchitis | 150 (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.