Estimated VO2max (mL/kg/min) in association with sociodemographic factors and lifestyle behaviour correlates
| n | Estimated VO2max | Low estimated VO2max | ||
| Median (95% CI) | % within subgroup | OR* (95% CI) | ||
| Sex | ||||
| Men | 2590 | 36.2 (35.8 to 36.5)† | na‡ | na |
| Women | 2718 | 30.4 (30.1 to 30.7) | na | na |
| Age | ||||
| 50–54 years | 1881 | 34.9 (34.5 to 35.1)§ | 24 | 1 (ref) |
| 55–59 years | 1812 | 33.7 (33.2 to 34.0) | 32 | 1.46 (1.27 to 1.69) |
| 60–64 years | 1615 | 31.5 (31.0 to 31.8) | 45 | 2.57 (2.23 to 2.97) |
| Marital status | ||||
| Married/cohabitation | 3766 | 33.8 (33.6 to 34.1)† | 31 | 1 (ref) |
| Divorced/single/widower | 1461 | 32.1 (31.7 to 32.6) | 38 | 1.37 (1.21 to 1.56) |
| Born in Sweden | ||||
| Yes | 4341 | 33.7 (33.4 to 33.9)† | 31 | 1 (ref) |
| No | 923 | 32.0 (31.3 to 32.5) | 43 | 1.75 (1.51 to 2.03) |
| Educational level | ||||
| University degree | 2480 | 34.3 (33.9 to 34.6)§ | 26 | 1 (ref) |
| High school/vocational education | 2215 | 32.8 (32.4 to 33.2) | 38 | 1.85 (1.63 to 2.10) |
| Elementary school | 555 | 31.6 (30.8 to 32.4) | 50 | 2.82 (2.32 to 3.42) |
| Employment | ||||
| Working, ≥50% of full-time | 4342 | 33.9 (33.6 to 34.1)§ | 30 | 1 (ref) |
| Retired | 231 | 30.3 (29.8 to 31.4) | 53 | 1.55 (1.17 to 2.05) |
| Disability pension/sickness pension/sick leave | 299 | 29.3 (28.4 to 30.2) | 54 | 2.60 (2.05 to 3.31) |
| Unemployed/student | 365 | 31.3 (30.9 to 32.2) | 45 | 1.88 (1.51 to 2.35) |
| Financial strain | ||||
| No | 4759 | 33.6 (33.4 to 33.9)† | 32 | 1 (ref) |
| Yes | 406 | 30.1 (29.6 to 30.7) | 51 | 2.51 (2.04 to 3.10) |
| Smoking habits | ||||
| Never smoker | 2463 | 34.6 (34.2 to 34.9)§ | 29 | 1 (ref) |
| Former smokers | 2015 | 32.3 (31.9 to 32.6) | 38 | 1.38 (1.21 to 1.57) |
| Regular smoker/sometimes | 716 | 32.2 (31.8 to 32.9) | 39 | 1.61 (1.35 to 1.92) |
| Pack-years | ||||
| Never smokers (0) | 2463 | 34.6 (34.2 to 34.9) | 29 | 1 (ref) |
| Former smokers, low (<15 pack-years) | 1220 | 33.0 (32.6 to 33.7) | 30 | 1.00 (0.86 to 1.17) |
| Former smokers, heavy (≥15 pack-years) | 795 | 31.1 (30.5 to 31.6) | 49 | 2.17 (1.83 to 2.56) |
| Current smokers, low (<15 pack-years) | 226 | 33.6 (32.4 to 34.8) | 30 | 1.11 (0.82 to 1.50) |
| Current smokers, heavy (≥15 pack-years) | 490 | 31.8 (31.1 to 32.3) | 42 | 1.88 (1.53 to 2.30) |
| Alcohol use | ||||
| No/low | 3948 | 33.7 (33.4 to 34.0) | 30 | 1 (ref) |
| Moderate | 639 | 33.3 (33.0 to 33.9) | 34 | 1.26 (1.05 to 1.51) |
| High | 33 | 32.5 (30.0 to 33.9) | 52 | 3.06 (1.51 to 6.19) |
*Adjusted for sex and age, comparing the lowest sex-specific tertile of estimated VO2max with the two higher tertiles.
†Significantly different from other subgroup (Mann-Whitney U test, p<0.0001).
‡Percentage in low estimated VO2max and OR not applicable for comparison between men and women, as tertiles were sex-specific.
§Kruskal-Wallis analysis of variance p<0.0001.