Table 1.
Levels of CRP among cases and controls by age strata and cohorts.
| By sampling age: | N (%) | CRP (mg/L) | p a | |
|---|---|---|---|---|
| Cases | Controls | |||
| All ages | 1330 (100%) | 3.4 (1.1–10.7) | 3.5 (1.1–10.1) | 0.89 |
| Age <20 | 282 (21.2%) | 3.9 (1.1–10.7) | 3.2 (0.9–12.5) | 0.98 |
| Age 20–29 | 750 (56.4%) | 3.4 (1.1–10.7) | 3.4 (1.1–9.7) | 0.92 |
| Age 30–39 | 298 (22.4%) | 3.1 (1.0–10.5) | 4.3 (1.2–11.1) | 0.73 |
| By biobank: | N (%) | Cases | Controls | p a |
| Umeå | 204 (15.3%) | 1.8 (0.6–10.8) | 2.5 (0.9–7.1) | 0.65 |
| PHAS | 276 (20.8%) | 3.5 (1.2–9.7) | 3.6 (1.0–13.1) | 0.49 |
| Örebro | 58 (4.4%) | 4.3 (1.8–8.8) | 5.3 (2.6–12.9) | 0.63 |
| Gothenburg | 94 (7.1%) | 3.9 (0.8–7.5) | 3.3 (1.1–13.2) | 0.17 |
| Skåne | 620 (46.6%) | 3.6 (1.3–11.3) | 3.3 (0.9–9.1) | 0.39 |
| Linköping | 78 (5.9%) | 3.5 (1.2–11.4) | 5.8 (2.4–15.7) | 0.45 |
| Combined cohort: | Cases/Controls (n) | Cases | Controls | p b |
| All ages | 837/984 | 3.0 (0.8–8.7) | 2.7 (0.8–8.4) | 0.20 |
| Age <20 | 164/179 | 3.6 (0.8–9.7) | 2.5 (0.6–10.1) | 0.34 |
| Age 20–29 | 466/546 | 3.0 (1.0–8.7) | 2.9 (0.9–8.4) | 0.52 |
| Age >30 | 207/259 | 2.2 (0.6–8.5) | 2.4 (0.6–7.5) | 0.55 |
Values for CRP represent median (25th–75th percentile). PHAS: Public Health Agency of Sweden.
a
Calculated with Wilcoxon signed-rank test (1:1 matching).
b
Calculated with Mann-Whitney U-test (1:N matching).