Table 2.
Association between PA variables and the risk of incident elevated waist circumference
| No. with incident elevated waist circumference (N = 234, 48.9%) | ||||||
|---|---|---|---|---|---|---|
| No. at risk (N = 479) | No. incident elevated waist circumference (% of No. at risk) | Model 1 adjusted Hazard Ratio (95% CI) | p-value | Model 2 adjusted Hazard Ratio (95% CI) | p-value | |
| Habitual PA level at baseline [min/week] | ||||||
| Low (< 75) | 25 | 14 (2.9) | ref | ref | ||
| Medium (75–149) | 118 | 58 (12.1) | 0.77 (0.42–1.41) | 0.397 | 0.78 (0.42–1.43) | 0.417 |
| High (≥ 150) | 336 | 162 (33.8) | 0.73 (0.41–1.30) | 0.284 | 0.72 (0.40–1.27) | 0.253 |
| Sports-related PA level at baseline [min/week] | ||||||
| Low (< 75) | 227 | 109 (22.8) | ref | ref | ||
| Medium (75–149) | 123 | 66 (13.8) | 1.05 (0.77–1.44) | 0.749 | 1.08 (0.79–1.49) | 0.618 |
| High (≥ 150) | 129 | 59 (12.3) | 0.92 (0.67–1.26) | 0.594 | 0.88 (0.64–1.21) | 0.424 |
| Sports-related intensity level at baseline [METh/week] {1} | ||||||
| Not intensively active (< 8.3) | 235 | 110 (23.0) | ref | ref | ||
| Moderately intensively active (8.3–16.5) | 115 | 59 (12.3) | 1.10 (0.80–1.52) | 0.552 | 1.07 (0.78–1.48) | 0.669 |
| Highly intensively active (≥ 16.6) | 128 | 65 (13.6) | 1.09 (0.80–1.48) | 0.593 | 1.06 (0.77–1.44) | 0.725 |
| Change in sports-related PA over time [min/week] {19} | ||||||
| Stable inactive (< 150– < 150) | 234 | 115 (24.0) | ref | ref | ||
| Quits activity (≥ – < 150) | 51 | 27 (5.6) | 0.96 (0.63–1.47) | 0.859 | 0.91 (0.59–1.39) | 0.656 |
| Starts activity (< 150– ≥ 150) | 111 | 58 (12.1) | 0.75 (0.54–1.04) | 0.084 | 0.78 (0.56–1.07) | 0.123 |
| Stable active (≥ 150– ≥ 150) | 64 | 26 (5.4) | 0.69 (0.45–1.05) | 0.084 | 0.66 (0.43–1.01) | 0.057 |
| Change in sports-related intensity level over time [METh/week] {4} | ||||||
| Stable low (< 16.6– < 16.6) | 250 | 126 (26.3) | ref | ref | ||
| Decreasing (≥ 16.6– < 16.6) | 47 | 29 (6.1) | 1.32 (0.87–1.98) | 0.188 | 1.37 (0.91–2.07) | 0.130 |
| Increasing (< 16.6– ≥ 16.6) | 98 | 42 (8.8) | 0.61 (0.43–0.88) | 0.007* | 0.62 (0.45–0.92) | 0.015 |
| Stable high (≥ 16.6– ≥ 16.6) | 80 | 35 (7.3) | 0.72 (0.49–1.05) | 0.084 | 0.70 (0.48–1.02) | 0.060 |
CI confidence interval, METh metabolic equivalent hours, min minutes, N number of participants, No. Number, PA physical activity, ref reference group, SES socio-economic status, WC waist circumference. Model 1: adjusted for age, sex and SES; Model 2: adjusted for age, sex, SES, and comorbidities with regard to MetS risk factors at study entry. {} indicates number of N missing. Significant values (p < 0.05) are in [bold]; significant values after Bonferroni correction for multiple testing are indicated by [*]