Characteristics | COPD | ILD | ||||
COPD cohort (n=242) | Females (n=120) | Males (n=122) | ILD cohort (n=66) | Females (n=31) | Males (n=35) | |
Age years | 70.2±9.2 | 71.2±9.0 | 69.3±9.4 | 66.7±10.7** | 66.6±9.9 | 66.9±11.5 |
O2 users | 53% | 60%# | 44% | 76%** | 77% | 74% |
Use of gait aid | 53% | 62%## | 56% | 53% | 55% | 51% |
mMRC score | 3.2±0.8 (n=190) | 3.3±0.8# (n=93) | 3.0±0.9 (n=97) | 3.3±0.9 (n=49) | 3.1±0.8 (n=22) | 3.4±1.0 (n=27) |
Smoking history pack-years | 47.0±23.9 | 42.2±21.2## | 52.0±25.5 | 33.6±18.7*** | 32.3±8.0# | 34.2±22.2 |
Never-smokers | 3.3% | 5.0% | 1.6% | 17%*** | 29% | 5.7% |
6MWD % predicted | 44.3±17.0 | 44.7±16.8 | 43.9±17.3 | 40.1±16.7 | 36.7±16.0 | 43.3±17.0 |
6MWD m | 271.4±105.9 | 259.4±99.6 | 282.8±110.7 | 255.0±111.3 | 222.9±97.2# | 286.0±116.7 |
CRQ total score | 4.0±1.1 | 3.7±1.1## | 4.2±1.0 | 4.0±1.1 | 3.9±1.1 | 4.2±1.1 |
Data are presented as mean±sd unless otherwise stated. mMRC: Modified Medical Research Council Dyspnoea Scale; 6MWD: 6-min walk distance; CRQ: Chronic Respiratory Disease Questionnaire. *: p<0.05; **: p<0.01; ***: p<0.001 compared with COPD cohort; #: p<0.05; ##: p<0.01 comparison of females and males within disease cohorts.