Table 1 Demographic characteristics of women in the BioCycle Study by symptom severity classification per cycle
| Â | Total | Total with data on PMS symptomsa | 5 or more moderate or severe symptoms | p value | 8 or more moderate or severe symptoms | p value | ||
|---|---|---|---|---|---|---|---|---|
Yes | No | Yes | No | |||||
Number of cycles [n (%)] | 509 | 490 | 167 (34) | 323 (66) | Â | 67 (14) | 423 (86) | Â |
Age (years) b | 27.4 ± 8.2 | 27.3 ± 8.2 | 27.1 ± 8.2 | 27.4 ± 8.2 | 0.67 | 28.2 ± 8.7 | 27.2 ± 8.1 | 0.32 |
Race [n (%)] | ||||||||
 White | 302 (59) | 290 (59) | 99 (59) | 191 (59) | 0.12 | 34 (51) | 256 (61) | 0.15 |
 Black | 101 (20) | 97 (20) | 26 (16) | 71 (22) |  | 13 (19) | 84 (20) |  |
 Other | 106 (21) | 103 (21) | 42(25) | 60 (19) |  | 20 (30) | 83 (20) |  |
 ≤ High School Education [n (%)] | 65 (13) | 62 (13) | 14 (8) | 48 (15) | 0.04 | 2 (3) | 60 (14) | 0.01 |
Current Smoker [n (%)] | 20 (4) | 19 (4) | 9 (5) | 10 (3) | 0.22 | 3 (5) | 16 (4) | 0.73 |
Physical activity [n (%)] | ||||||||
 Low | 48 (9) | 47 (10) | 13 (8) | 34 (11) | 0.61 | 5 (8) | 42 (10) | 0.80 |
 Moderate | 182 (36) | 174 (36) | 62 (37) | 112 (35) |  | 23 (34) | 151 (36) |  |
 High | 279 (55) | 269 (55) | 92 (55) | 177 (55) |  | 39 (58) | 230 (54) |  |
BMI (kg/m2) | 24.1 ± 3.9 | 24.1 ± 3.9 | 24.5 ± 3.8 | 23.9 ± 3.9 | 0.07 | 24.9 ± 3.6 | 24.0 ± 3.9 | 0.06 |
Nulliparous [n (%)] | 367 (74) | 356 (74) | 119 (74) | 237 (74) | 0.94 | 47 (70) | 309 (75) | 0.45 |
Total calories (kcal) | 1608 ± 405 | 1608 ± 407 | 1611 ± 413 | 1607 ± 404 | 0.92 | 1622 ± 415 | 1606 ± 406 | 0.76 |
Fiber (g/day) | 13.6 ± 6.0 | 13.5 ± 5.7 | 13.7 ± 5.3 | 13.4 ± 5.8 | 0.55 | 14.3 ± 5.4 | 13.4 ± 5.7 | 0.19 |
Currently sexually active [n (%)] | 267 (71) | 255 (70) | 99 (74) | 156 (67) | 0.16 | 40 (73) | 215 (69) | 0.75 |
Ever sexually active [n (%)] | 378 (75) | 365 (75) | 133 (82) | 232 (72) | 0.03 | 55 (82) | 310 (74) | 0.22 |
Alcohol (in the past 12Â months) | ||||||||
 None | 172 (34) | 165 (34) | 55 (33) | 110 (34) | 0.04 | 19 (28) | 146 (35) | 0.0007 |
 1 drink | 54 (11) | 51 (10) | 18 (11) | 33 (10) |  | 11 (16) | 40 (9) |  |
 2 drinks | 144 (28) | 137 (28) | 47 (28) | 90 (28) |  | 16 (24) | 121 (29) |  |
 3 drinks | 80 (16) | 78 (16) | 20 (12) | 58 (18) |  | 9 (13) | 69 (16) |  |
 4 drinks | 38 (7) | 38 (8) | 13 (8) | 25 (8) |  | 2 (3) | 36 (9) |  |
 ≥ 5 drinks | 21 (4) | 21 (4) | 14 (8) | 7 (2) |  | 10 (15) | 11 (3) |  |
Use of pain relievers | 143 (28) | 134 (28) | 54 (33) | 80 (25) | 0.09 | 23 (34.3) | 111 (26.5) | 0.19 |