Likert scale severity ratings of self-reported sleep disturbances from baseline to year 1 among women in SWAN who reported sleep disturbances
| Baseline visit | Visit 1 year after | Visit 2 years after | ||||
| No sleep medication n=447 | Medication users n=238 | No sleep medication n=447 | Medication users n=238 | No sleep medication n=353 | Medication users n=187 | |
| N (%) | N (%) | N (%) | N (%) | N (%) | N (%) | |
| Sleep disturbance | ||||||
| Difficulty initiating sleep (per week) | ||||||
| 1 (no difficulty) | 154 (34.5) | 81 (34) | 190 (42.5) | 94 (39.5) | 156 (44.2) | 70 (37.4) |
| 2 (≤1 night/week) | 74 (16.6) | 31 (13) | 72 (16.1) | 29 (12.2) | 52 (14.7) | 33 (17.6) |
| 3 (1–2 nights/week) | 81 (18.1) | 44 (18.5) | 82 (18.3) | 37 (15.5) | 70 (19.8) | 32 (17.1) |
| 4 (3–4 nights/week) | 74 (16.6) | 39 (16.4) | 49 (11) | 34 (14.3) | 32 (9.1) | 16 (8.6) |
| 5 (5–7 nights/week) | 63 (14.1) | 43 (18.1) | 54 (12.1) | 44 (18.5) | 43 (12.2) | 36 (19.3) |
| Waking frequently during sleep | ||||||
| 1 (no difficulty) | 47 (10.5) | 20 (8.4) | 63 (14.1) | 34 (14.3) | 42 (11.9) | 25 (13.4) |
| 2 (<1 night/week) | 41 (9.2) | 23 (9.7) | 54 (12.1) | 25 (10.5) | 50 (14.2) | 21 (11.2) |
| 3 (1–2 nights/week) | 68 (15.2) | 37 (15.5) | 89 (19.9) | 38 (16) | 78 (22.1) | 36 (19.3) |
| 4 (3–4 nights/week) | 118 (26.4) | 69 (29) | 93 (20.8) | 47 (19.7) | 70 (19.8) | 40 (21.4) |
| 5 (5–7 nights/week) | 173 (38.7) | 89 (37.4) | 148 (33.1) | 94 (39.5) | 113 (32) | 65 (34.8) |
| Early morning awakening | ||||||
| 1 (no difficulty) | 127 (28.4) | 69 (29) | 171 (38.3) | 72 (30.3) | 122 (34.6) | 70 (37.4) |
| 2 (<1 night/week) | 83 (18.6) | 37 (15.5) | 82 (18.3) | 49 (20.6) | 72 (20.4) | 30 (16) |
| 3 (1–2 nights/week) | 102 (22.8) | 51 (21.4) | 67 (15) | 35 (14.7) | 67 (19) | 34 (18.2) |
| 4 (3–4 nights/week) | 76 (17) | 39 (16.4) | 66 (14.8) | 30 (12.6) | 41 (11.6) | 20 (10.7) |
| 5 (5–7 nights/week) | 59 (13.2) | 42 (17.6) | 61 (13.6) | 52 (21.8) | 51 (14.4) | 33 (17.6) |
| Any complaint of 3 or more times per week* | ||||||
| Yes | 322 (72) | 183 (76.9) | 273 (61.1) | 159 (66.8) | 203 (57.5) | 122 (65.2) |
Means calculated based on 5-point Likert scale, where 1=no difficulties on any nights, 2=difficulties on less than one night per week, 3=one to two nights per week, 4=three to four nights per week and 5=five to seven nights per week.
SWAN, Study of Women’s Health Across the Nation.