Table 3 Agreement between breast buds diagnosed by the girls’ mother and trained personnel, stratified by girl’s BMI z-score and mother’s schooling
From: Breast bud detection: a validation study in the Chilean Growth Obesity Cohort Study
Mother’s Breast Tanner rating | Breast Tanner rating by trained personnel | ||||
|---|---|---|---|---|---|
Tanner 2 + | Tanner 1 | Kappa index | Spearman | ||
N (%) | N (%) | (95% CI) | |||
Study population | |||||
Entire Study Population (n = 341) | Tanner 2 | 49 (89.1) | 22 (7.7) | 0.73 (0.63; 0.82) | 0.74 |
Tanner 1 | 6 (10.9) | 264 (92.3) | |||
Total | 55 | 286 | |||
Stratified by girls’ BMI z-score at assessment | |||||
Girls’ BMI z-score ≤ 1DS (n = 204) | Tanner 2 | 27 (87.1) | 11 (6.4) | 0.74 (0.65; 0.83) | 0.74 |
Tanner 1 | 4 (12.9) | 162 (93.6) | |||
Total | 31 | 173 | |||
Girls’ BMI z-score > 1DS (n = 137) | Tanner 2 | 22 (91.7) | 11 (9.7) | 0.71 (0.62; 0.81) | 0.73 |
Tanner 1 | 2 (8.3) | 102 (90.3) | |||
Total | 24 | 113 | |||
Stratified by mother’s schooling | |||||
Mother’s schooling < 8 years (n = 123) | Tanner 2 | 23 (88.5) | 11 (11.3) | 0.69 (0.59; 0.79) | 0.70 |
Tanner 1 | 3(11.5) | 86 (88.7) | |||
Total | 26 | 97 | |||
Mother’s schooling ≥ 8 years (n = 216) | Tanner 2 | 26 (89.7) | 10(5.4) | 0.77 (0.68; 0.85) | 0.77 |
Tanner 1 | 3 (10.3) | 177 (94.7) | |||
Total | 29 | 187 | |||