TABLE 2.
Pooled correlation coefficients
| k cohorts | n participants | Pooled r | 95% CI | 95% PI | P‐value | Between‐study heterogeneity | |||
|---|---|---|---|---|---|---|---|---|---|
| I 2 (%) | Q | P‐value | |||||||
| HairF versus BMI | 122 | 26,527 | 0.10 | 0.08; 0.13 | −0.04; 0.24 | <0.0001 | 51.2 | 221.4 | <0.0001 |
| HairF versus BMI SDS | 11 | 1,247 | 0.12 | 0.06; 0.18 | 0.06; 0.18 | <0.0001 | 0.0 | 11.8 | 0.30 |
| HairF versus WC | 24 | 11,006 | 0.11 | 0.07; 0.15 | −0.03; 0.26 | <0.0001 | 68.3 | 59.7 | <0.0001 |
| HairF versus WHR | 16 | 6,786 | 0.11 | 0.07; 0.15 | 0.03; 0.19 | <0.0001 | 28.4 | 22.3 | 0.10 |
| HairE versus BMI | 16 | 8,210 | 0.11 | 0.07; 0.15 | 0.00; 0.21 | <0.0001 | 52.7 | 31.0 | 0.01 |
| HairE versus WC | 7 | 3,158 | 0.18 | 0.11; 0.24 | 0.06; 0.29 | <0.0001 | 45.7 | 9.6 | 0.14 |
| HairE versus WHR | 2 | 1,314 | NA a | NA | NA | NA | NA | NA | NA |
Abbreviations: CI, confidence interval; HairF, hair cortisol; HairE, hair cortisone; NA, not applicable; PI, prediction interval; SDS, standard deviation score; WC, waist circumference; WHR, waist‐to‐hip ratio.
a
Meta‐analysis not performed due to small number of cohorts.