From: Blood pressure tracking in urban black South African children: birth to twenty cohort
Correlation between two mean age categories | Systolic BP | Diastolic BP | ||||||
---|---|---|---|---|---|---|---|---|
 | Boys | Girls | Boys | Girls | ||||
 | Crude | Adjusted | Crude | Adjusted | Crude | Adjusted | Crude | Adjusted |
5–8 | 0.26*** | 0.22*** | 0.39*** | 0.33*** | 0.19*** | 0.18*** | 0.21*** | 0.17*** |
5–13 | 0.28*** | 0.20*** | 0.27*** | 0.20*** | 0.24*** | 0.21*** | 0.20*** | 0.17*** |
5–14 | 0.25*** | 0.20*** | 0.16*** | 0.16*** | 0.22*** | 0.22*** | 0.15*** | 0.13*** |
5–16 | 0.22*** | 0.20*** | 0.25*** | 0.23*** | 0.23*** | 0.26*** | 0.26*** | 0.25*** |
5–18 | 0.23*** | 0.19*** | 0.18*** | 0.13** | 0.23*** | 0.25*** | 0.15*** | 0.14** |
Average | 0.25 | 0.20 | 0.30 | 0.21 | 0.22 | 0.22 | 0.19 | 0.17 |
8–13 | 0.42*** | 0.38*** | 0.43*** | 0.38*** | 0.25*** | 0.20*** | 0.32*** | 0.26*** |
8–14 | 0.42*** | 0.41*** | 0.43*** | 0.39*** | 0.28*** | 0.31*** | 0.36*** | 0.36*** |
8–16 | 0.27*** | 0.30*** | 0.40*** | 0.44*** | 0.18*** | 0.17*** | 0.31*** | 0.30*** |
8–18 | 0.29*** | 0.29*** | 0.34*** | 0.29*** | 0.22*** | 0.22*** | 0.27*** | 0.28*** |
Average | 0.35 | 0.35 | 0.40 | 0.38 | 0.23 | 0.23 | 0.32 | 0.30 |
13–14 | 0.53*** | 0.61*** | 0.60*** | 0.61*** | 0.53*** | 0.55*** | 0.58*** | 0.62*** |
13–16 | 0.50*** | 0.57*** | 0.42*** | 0.49*** | 0.39*** | 0.43*** | 0.41*** | 0.44*** |
13–18 | 0.50*** | 0.53*** | 0.41*** | 0.40*** | 0.36*** | 0.39*** | 0.47*** | 0.49*** |
Average | 0.51 | 0.57 | 0.47 | 0.50 | 0.42 | 0.46 | 0.49 | 0.51 |
14–16 | 0.53*** | 0.57*** | 0.47*** | 0.54*** | 0.48*** | 0.51*** | 0.46*** | 0.49*** |
14–18 | 0.47*** | 0.45*** | 0.54*** | 0.44*** | 0.39*** | 0.39*** | 0.48*** | 0.48*** |
Average | 0.50 | 0.51 | 0.51 | 0.49 | 0.43 | 0.45 | 0.47 | 0.49 |
16–18 | 0.46*** | 0.36*** | 0.44*** | 0.34*** | 0.37*** | 0.34*** | 0.45*** | 0.42*** |