Table 1 |
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|
Summary statistics for 1,031 female participants in wave 1 of ALSA classified according to age at menarche |
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|
Age at menarche |
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|
|
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|
Characteristic |
Overall |
< 12 |
≥ 12 |
Missing |
P-valuea |
|
n = 1,031 |
n = 106 |
n = 883 |
n = 42 |
||
|
|
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|
Age group |
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|
65 - 69 |
123 (12%) |
14 (13%) |
106 (12%) |
3 (7%) |
0.045 |
|
70 - 74
|
283 (27%) |
41 (39%) |
238 (27%) |
4 (10%) |
|
|
75 - 79
|
241 (23%) |
26 (25%) |
211 (24%) |
4 (10%) |
|
|
80 - 84
|
194 (19%) |
14 (13%) |
170 (19%) |
10 (24%) |
|
|
≥ 85
|
190 (18%) |
11 (10%) |
158 (18%) |
21 (50%) |
|
|
Place of residence |
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|
Community |
948 (92%) |
100 (94%) |
821 (93%) |
27 (64%) |
0.601 |
|
Residential |
83 (8%) |
6 (6%) |
62 (7%) |
15 (36%) |
|
|
Self rated health |
|||||
|
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%) |
|
|
Number of morbid conditions |
|||||
|
Median (IQR) |
3 (2 - 4) |
3 (2 - 5) |
3 (2 - 4) |
2 (0 - 3) |
0.012d |
|
Cognitive function |
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|
Good |
888 (86%) |
99 (93%) |
758 (86%) |
31 (74%) |
0.031 |
|
Poor
|
143 (14%) |
7 (7%) |
125 (14%) |
11 (26%) |
|
|
Smoking status |
|||||
|
Never smoker |
718 (69%) |
66 (62%) |
618 (70%) |
35 (83%) |
0.266 |
|
Former smoker
|
229 (23%) |
29 (28%) |
193 (22%) |
7 (16%) |
|
|
Current smoker
|
84 (8%) |
11 (10%) |
72 (8%) |
1 (2%) |
|
|
Sedentary |
|||||
|
No |
541 (52%) |
54 (50%) |
461 (52%) |
26 (62%) |
0.805 |
|
Yes
|
490 (48%) |
52 (50%) |
422 (48%) |
16 (38%) |
|
|
Body Mass Index |
|||||
|
< 20 kg/m2
|
41 (4%) |
2 (2%) |
39 (4%) |
0 (0%) |
0.001 |
|
20 - 25 kg/m2
|
280 (27%) |
18 (17%) |
254 (29%) |
8 (19%) |
|
|
> 25 kg/m2
|
428 (42%) |
64 (60%) |
355 (40%) |
9 (21%) |
|
|
Missing
|
282 (27%) |
22 (21%) |
235 (27%) |
25 (59%) |
|
|
Natural menopause |
|||||
|
No |
273 (26%) |
32 (30%) |
219 (25%) |
22 (52%) |
0.229 |
|
Yes |
758 (74%) |
74 (70%) |
664 (75%) |
20 (48%) |
|
|
Age at menopause |
|||||
|
≤ 44b
|
104 (10%) |
15 (14%) |
89 (10%) |
0 - |
0.123 |
|
45 - 49
|
192 (19%) |
19 (18%) |
172 (19%) |
1 (4%) |
|
|
50 - 54
|
316 (31%) |
33 (31%) |
276 (31%) |
7 (27%) |
|
|
≥ 55
|
148 (15%) |
7 (7%) |
129 (15%) |
12 (46%) |
|
|
Surgical
|
254 (25%) |
32 (30%) |
216 (24%) |
6 (23%) |
|
|
Reproductive years |
|||||
|
≤ 30c
|
218 (23%) |
20 (19%) |
198 (24%) |
- |
0.015 |
|
31 - 40
|
608 (65%) |
63 (60%) |
545 (65%) |
- |
|
|
≥ 40
|
116 (12%) |
22 (21%) |
94 (11%) |
- |
|
|
Parity |
|||||
|
0
|
136 (13%) |
14 (13%) |
113 (13%) |
9 (21%) |
0.527 |
|
1 - 2
|
439 (43%) |
44 (42%) |
372 (42%) |
23 (55%) |
|
|
3 - 4
|
351 (34%) |
41 (39%) |
302 (34%) |
8 (19%) |
|
|
≥ 5
|
105 (10%) |
7 (7%) |
96 (11%) |
2 (5%) |
|
|
Age first pregnancy |
|||||
|
Median (IQR) |
25 (22 - 28) |
24 (21 - 28) |
25 (22 - 28) |
26 (22 - 35) |
0.149d |
|
Age last pregnancy |
|||||
|
Median (IQR) |
33 (29-37) |
33 (29 - 36) |
33 (29 - 37) |
31 (29 - 36) |
0.425d |
|
Dead at 15 years follow-up |
|||||
|
No |
358 (35%) |
34 (32%) |
319 (36%) |
5 (12%) |
0.411 |
|
Yes |
673 (65%) |
72 (68%) |
564 (64%) |
37 (88%) |
|
|
|
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|
Shown are n (%) unless otherwise noted. a: P-value excludes missing category in calculation b: n = 954 available age at menopause c: n = 942 available reproductive years d: P-value based on Mann-Whitney U-test; all other shown P-values based on chi-square tests of association |
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|
Giles et al. BMC Public Health 2010 10:341 doi:10.1186/1471-2458-10-341 |
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