Table 1 Descriptive statistics for study variables in each cohort
From: Purpose in life and lung function: an individual-participant meta-analysis of six cohort studies
Variable | HRS | MIDUS | WLS | NHATS | ELSA | SHARE |
|---|---|---|---|---|---|---|
Age (years) | 64.66 (10.52) | 55.18 (11.80) | 70.53 (4.13) | 76.53 (7.62) | 65.42 (8.93) | 66.12 (9.48) |
Age range | 18–104 | 34–84 | 40–92 | 65–107 | 52–92 | 27–102 |
Sex (female) | 59.6% (9006) | 54.4% (565) | 53.3% (3918) | 56.8% (5559) | 54.5% (3384) | 57.0% (26033) |
Race (Black) | 15.7% (2374) | 2.5% (26) | -- | 20.7% (2025) | -- | -- |
Race (Otherwise identified) | 6.5% (983) | 4.5% (47) | -- | 2.9% (286) | 1.4% (84) | -- |
Hispanic (yes) | 10.5% (1592) | 3.5% (36) | -- | 5.8% (569) | -- | -- |
Educationa | 12.86 (3.02) | 7.73 (2.44) | 13.93 (2.44) | 5.21 (2.20) | 3.47 (2.23) | 11.19 (4.34) |
Height (m) | 1.66 (0.10) | 1.69 (0.09) | 1.68 (0.09) | 1.67 (0.10) | 1.66 (0.09) | 1.68 (0.09) |
Purpose in lifeb | 4.66 (0.92) | 5.63 (0.92) | 4.64 (0.79) | 2.82 (0.43) | 3.57 (0.72) | 3.59 (0.69) |
Baseline maximum PEF (L/min) | 377.76 (130.79) | 422.05 (129.07) | 406.75 (132.77) | 327.12 (134.77) | 375.85 (142.19) | 352.93 (154.78) |
Baseline PEF prop | 0.78 (0.21) | 0.82 (0.19) | 0.85 (0.21) | 0.72 (0.24) | 0.76 (0.22) | 0.72 (0.28) |
Incident PEF@80 | 37.1% (2406) | 52.7% (547) | -- | 76.9% (7523) | 41.8% (687) | -- |
Body mass index (kg/m2) | 28.40 (5.65) | 29.22 (6.02) | 29.75 (5.58) | 27.83 (5.72) | 27.98 (4.89) | 27.09 (4.58) |
Ever smoker (yes) | 53.3% (8059) | 44.8% (465) | 52.9% 3803) | 51.3% (5014) | 63.0% (3909) | 45.3% (20700) |
Physical activityc | 2.62 (1.01) | 3.45 (1.31) | 19.75 (26.46) | 0.38 (0.48) | 2.62 (0.92) | 2.99 (0.94) |
Probable depression (yes) | 19.5% (2952) | 13.2% (137) | 10.8% (770) | 13.3% (1289) | 19.7% (1211) | 25.1% (11397) |
Time (years) | 7.71 (3.88) | 11.65 (1.33) | -- | 3.46 (2.46) | 6.52 (1.93) | -- |
N | 15,112 | 1038 | 7355 | 9780 | 6205 | 45,700 |