Table 1. Prevalence of normal vs. abnormal menstruation characteristics in the last 6 months for women in CHIWOS cohort (N = 521).
|
Total N = 521 N (%) |
|||
|---|---|---|---|
| Overall menstruation history in the past 6 months* | |||
| Normal menstruation | 230 | (44.1) | |
| Abnormal menstruation | 291 | (55.9) | |
| Individual measures of menstruation history in the past 6 months | |||
| Regularity: Amenorrhea | |||
| Normal (most recent menstrual period within 3 months) | 490 | (94.0) | |
| Abnormal (most recent menstrual period more than 3 months ago) | 31 | (6.1) | |
| Frequency/Regularity: Menstrual cycle length | |||
| Normal (24–35 days) | 329 | (63.1) | |
| Abnormal (<24 days, >35 days, too irregular to say) | 173 | (33.8) | |
| DK/PNTA length | 10 | (1.9) | |
| Volume: Heavy Menstrual Bleeding | |||
| NORMAL Light |
40 | (7.7) | |
| Medium | 287 | (55.1) | |
| ABNORMAL | 165 | (31.0) | |
| Heavy | 86 | (16.5) | |
| Very heavy | 43 | (8.3) | |
| Too irregular to say | 36 | (6.9) | |
| DK/PNTA | 2 | (0.4) | |
| Duration: Prolonged menstrual bleeding | |||
| NORMAL Less than 4 days |
107 | (19.7) | |
| Between 4–7 days | 339 | (62.5) | |
| ABNORMAL Greater than 7 days |
21 | (3.9) | |
| Too irregular to say | 24 | (4.4) | |
| DK/PNTA | 3 | (0.6) | |
| Irregular: Intermenstrual bleeding | |||
| Normal (No) | 420 | (80.6) | |
| Abnormal (Yes) | 71 | (13.6) | |
| DK/PNTA | 3 | (0.6) | |
DK/PNTA, Don’t Know or Prefer Not to Answer
Note:
*If participant reported at least one abnormal characteristic of her menstrual cycle as shown below, then she was classified as having ‘Abnormal Menstruation’. Otherwise, she is classified as Normal Menstruation.