Table 1 Summary statistics for 1,031 female participants in wave 1 of ALSA classified according to age at menarche
| Â | Â | Age at menarche | Â | ||
|---|---|---|---|---|---|
Characteristic | Overall | < 12 | ≥ 12 | Missing | P-valuea |
| Â | n = 1,031 | n = 106 | n = 883 | n = 42 | Â |
Age group | Â | Â | Â | Â | Â |
   65 - 69 | 123 (12%) | 14 (13%) | 106 (12%) | 3 (7%) | 0.045 |
70 - 74 | 283 (27%) | 41 (39%) | 238 (27%) | 4 (10%) | Â |
75 - 79 | 241 (23%) | 26 (25%) | 211 (24%) | 4 (10%) | Â |
80 - 84 | 194 (19%) | 14 (13%) | 170 (19%) | 10 (24%) | Â |
≥ 85 | 190 (18%) | 11 (10%) | 158 (18%) | 21 (50%) |  |
Place of residence | Â | Â | Â | Â | Â |
   Community | 948 (92%) | 100 (94%) | 821 (93%) | 27 (64%) | 0.601 |
   Residential | 83 (8%) | 6 (6%) | 62 (7%) | 15 (36%) |  |
Self rated health | Â | Â | Â | Â | Â |
   Excellent/very good | 401 (39%) | 32 (30%) | 357 (40%) | 12 (29%) | 0.114 |
   Good | 324 (31%) | 36 (34%) | 269 (31%) | 19 (45%) |  |
Fair/poor | 306 (30%) | 38 (36%) | 257 (29%) | 11 (26%) | Â |
Number of morbid conditions | Â | Â | Â | Â | Â |
   Median (IQR) | 3 (2 - 4) | 3 (2 - 5) | 3 (2 - 4) | 2 (0 - 3) | 0.012d |
Cognitive function | Â | Â | Â | Â | Â |
   Good | 888 (86%) | 99 (93%) | 758 (86%) | 31 (74%) | 0.031 |
Poor | 143 (14%) | 7 (7%) | 125 (14%) | 11 (26%) | Â |
Smoking status | Â | Â | Â | Â | Â |
   Never smoker | 718 (69%) | 66 (62%) | 618 (70%) | 35 (83%) | 0.266 |
Former smoker | 229 (23%) | 29 (28%) | 193 (22%) | 7 (16%) | Â |
Current smoker | 84 (8%) | 11 (10%) | 72 (8%) | 1 (2%) | Â |
Sedentary | Â | Â | Â | Â | Â |
   No | 541 (52%) | 54 (50%) | 461 (52%) | 26 (62%) | 0.805 |
Yes | 490 (48%) | 52 (50%) | 422 (48%) | 16 (38%) | Â |
Body Mass Index | Â | Â | Â | Â | Â |
< 20 kg/m 2 | 41 (4%) | 2 (2%) | 39 (4%) | 0 (0%) | 0.001 |
20 - 25 kg/m 2 | 280 (27%) | 18 (17%) | 254 (29%) | 8 (19%) | Â |
> 25 kg/m 2 | 428 (42%) | 64 (60%) | 355 (40%) | 9 (21%) | Â |
Missing | 282 (27%) | 22 (21%) | 235 (27%) | 25 (59%) | Â |
Natural menopause | Â | Â | Â | Â | Â |
   No | 273 (26%) | 32 (30%) | 219 (25%) | 22 (52%) | 0.229 |
   Yes | 758 (74%) | 74 (70%) | 664 (75%) | 20 (48%) |  |
Age at menopause | Â | Â | Â | Â | Â |
≤ 44 b | 104 (10%) | 15 (14%) | 89 (10%) | 0 - | 0.123 |
45 - 49 | 192 (19%) | 19 (18%) | 172 (19%) | 1 (4%) | Â |
50 - 54 | 316 (31%) | 33 (31%) | 276 (31%) | 7 (27%) | Â |
≥ 55 | 148 (15%) | 7 (7%) | 129 (15%) | 12 (46%) |  |
Surgical | 254 (25%) | 32 (30%) | 216 (24%) | 6 (23%) | Â |
Reproductive years | Â | Â | Â | Â | Â |
≤ 30 c | 218 (23%) | 20 (19%) | 198 (24%) | - | 0.015 |
31 - 40 | 608 (65%) | 63 (60%) | 545 (65%) | - | Â |
≥ 40 | 116 (12%) | 22 (21%) | 94 (11%) | - |  |
Parity | Â | Â | Â | Â | Â |
0 | 136 (13%) | 14 (13%) | 113 (13%) | 9 (21%) | 0.527 |
1 - 2 | 439 (43%) | 44 (42%) | 372 (42%) | 23 (55%) | Â |
3 - 4 | 351 (34%) | 41 (39%) | 302 (34%) | 8 (19%) | Â |
≥ 5 | 105 (10%) | 7 (7%) | 96 (11%) | 2 (5%) |  |
Age first pregnancy | Â | Â | Â | Â | Â |
   Median (IQR) | 25 (22 - 28) | 24 (21 - 28) | 25 (22 - 28) | 26 (22 - 35) | 0.149d |
Age last pregnancy | Â | Â | Â | Â | Â |
   Median (IQR) | 33 (29-37) | 33 (29 - 36) | 33 (29 - 37) | 31 (29 - 36) | 0.425d |
Dead at 15 years follow-up | Â | Â | Â | Â | Â |
   No | 358 (35%) | 34 (32%) | 319 (36%) | 5 (12%) | 0.411 |
   Yes | 673 (65%) | 72 (68%) | 564 (64%) | 37 (88%) |  |