Table 1.
Factors associated to early menarche in 1 072 girls aged 15 years. Univariate analysis.
| Early menarche (N = 57) n (%) |
Menarche ≥ 11 y. (N = 1 015) n (%) |
OR (95%CI) | p value* | |
|---|---|---|---|---|
| Familial environment | ||||
| Family structure | ||||
| traditional | 31 (54.4) | 739 (72.9) | 1 | 0.004 |
| other family structure | 26 (45.6) | 275 (27.1) | 2.3 (1.3-3.9) | |
| Parental employment | ||||
| at least one parent working | 54 (94.7) | 937 (92.9) | 1 | 0.590 |
| none | 3 (5.3) | 72 (7.1) | 1.4 (0.4-4.5) | |
| FAS | ||||
| medium to high | 43 (76.8) | 881 (87.4) | 1 | 0.026 |
| low | 13 (23.2) | 127 (12.6) | 2.1 (1.1-4.0) | |
| School experience | ||||
| School results | ||||
| average to higher | 42 (73.7) | 815 (80.6) | 1 | 0.186 |
| below average | 15 (26.3) | 196 (19.4) | 1.5 (0.8-2.7) | |
| Liking school | ||||
| yes | 32 (58.2) | 605 (59.8) | 1 | 0.812 |
| no | 23 (41.8) | 407 (40.2) | 1.1 (0.6-1.9) | |
| Peers acceptance | ||||
| high | 33 (57.9) | 754 (74.7) | 1 | 0.008 |
| low | 24 (42.1) | 255 (25.3) | 2.2 (1.2-3.8) | |
| Risk behaviours | ||||
| Daily smoking | ||||
| no | 39 (76.5) | 816 (84.0) | 1 | 0.139 |
| yes | 12 (23.5) | 155 (16.0) | 1.6 (0.9-3.1) | |
| Life drunkenness episodes | ||||
| <2 | 35 (63.6) | 810 (82.4) | 1 | 0.001 |
| ≥2 | 20 (36.4) | 173 (17.6) | 2.7 (1.5-4.6) | |
| Life cannabis use | ||||
| <3 episodes | 44 (78.6) | 852 (86.5) | 1 | 0.108 |
| ≥3 episodes | 12 (21.4) | 133 (13.5) | 1.8 (0.9-3.5) | |
| Sexual initiation <15 years | ||||
| no or not yet | 37 (71.1) | 856 (88.9) | 1 | 0.001 |
| yes | 15 (28.9) | 107 (11.1) | 3.2 (1.7-6.3) | |
| Physical and psychological factors | ||||
| Self-reported BMI | ||||
| normal or thin | 39 (70.9) | 911 (93.0) | 1 | <0.001 |
| overweight or obese | 16 (29.1) | 68 (7.0) | 5.5 (2.9-10.6) | |
| Body image | ||||
| normal or thin | 21 (36.8) | 579 (57.1) | 1 | 0.004 |
| overweight or obese | 36 (63.2) | 435 (42.9) | 2.3 (1.3-4.0) | |
| Diet use | ||||
| no | 39 (68.4) | 825 (82.1) | 1 | 0.023 |
| yes | 18 (31.6) | 180 (17.9) | 2.1 (1.1-4.0) | |
| Self-rated health | ||||
| good | 37 (64.9) | 807 (79.8) | 1 | 0.011 |
| bad | 20 (35.1) | 204 (20.2) | 2.1 (1.2-3.8) | |
| Life assessment | ||||
| high | 39 (68.4) | 781 (77.4) | 1 | 0.137 |
| low | 18 (31.6) | 228 (22.6) | 1.6 (0.9-2.9) | |
| Recurrent health complaints | ||||
| no | 16 (28.1) | 489 (48.3) | 1 | 0.005 |
| yes | 41 (71.9) | 524 (51.7) | 2.4 (1.3-4.4) |
Abbreviations: FAS = Family Affluence Scale; BMI = Body Mass Index; OR = Odds Ratio; CI = Confidence Interval
*χ2-test or Fisher's exact test where necessary
All analysis took into account the sampling strategy