Subjects n | 3475 | 109 | | 3584 |
Age years | 47.6±1.5 | 47.7±1.4 | 0.205# | 47.6±1.5 |
BMI kg·m−2 | 25.4±4.7 | 26.5±5.5 | 0.059# | 25.5±4.7 |
SF-36 PCS | 51.9±7.8 | 49.9±9.3 | 0.035# | 51.9±7.9 |
SF-36 MCS | 49.5±10.0 | 46.4±11.1 | 0.004# | 49.5±10.1 |
SEIFA IRSD | 1011±86 | 1000±77 | 0.160# | 1010±85 |
Education level | | | 0.009¶ | |
Less than high school | 1748 (42.8) | 61 (56.0) | | 1539 (43.2) |
High school/trade/diploma | 1328 (38.5) | 33 (30.3) | | 1361 (38.2) |
University/postgraduate | 645 (18.7) | 15 (13.8) | | 660 (18.5) |
Presence of back pain | | | 0.077¶ | |
Never | 901 (26.0) | 20 (18.3) | | 921 (25.8) |
Rarely | 932 (26.9) | 31 (28.4) | | 963 (27.0) |
Sometimes | 1100 (31.8) | 37 (33.9) | | 1137 (31.8) |
Often | 529 (15.3) | 21 (19.3) | | 550 (15.4) |
Presence of chest pain | | | 0.204¶ | |
Never | 2769 (80.4) | 82 (75.2) | | 2851 (80.2) |
Rarely | 419 (12.2) | 18 (16.5) | | 437 (12.3) |
Sometimes/often | 256 (7.4) | 9 (8.3) | | 265 (7.5) |
Breathing difficulties | | | <0.001¶ | |
Never | 2723 (78.9) | 62 (57.4) | | 2785 (78.3) |
Rarely | 367 (10.6) | 23 (21.3) | | 390 (11.0) |
Sometimes/often | 361 (10.5) | 23 (21.3) | | 384 (10.8) |
Asthma | | | <0.001+ | |
No | 3104 (89.4) | 82 (75.2) | | 3186 (89.0) |
Yes | 368 (10.6) | 27 (24.8) | | 395 (11.0) |
Presence of allergies, hay fever, sinusitis | | | 0.002¶ | |
Never | 1478 (42.8) | 31 (28.7) | | 1509 (42.4) |
Rarely | 613 (17.7) | 22 (20.4) | | 635 (17.8) |
Sometimes | 911 (26.4) | 33 (30.6) | | 944 (26.5) |
Often | 453 (13.1) | 22 (20.4) | | 475 (13.3) |
Walking 100 m | | | 0.113+ | |
Not limited | 3317 (96.5) | 101 (93.5) | | 3418 (96.4) |
Limited (a little or a lot) | 122 (3.5) | 7 (6.5) | | 129 (3.6) |
Walking ½ km | | | 0.049+ | |
Not limited | 3204 (93.3) | 95 (88.0) | | 3299 (93.2) |
Limited (a little or a lot) | 229 (6.7) | 13 (12.0) | | 242 (6.8) |
Walking 1 km | | | 0.024+ | |
Not limited | 2951 (85.9) | 84 (77.8) | | 3035 (85.7) |
Limited (a little or a lot) | 483 (14.1) | 24 (22.2) | | 507 (14.3) |