Table 1 PSQI score (Aloba et al. 2007)
Component 1: Subjective sleep quality—question 9 | |
Response to Q9 | Component 1 score |
Very good | 0 |
Fairly good | 1 |
Fairly bad | 2 |
Very bad | 3 |
Component 2: Sleep latency—questions 2 and 5a | |
Response to Q2 | Component 2/Q2 subscore |
≤ 15 min | 0 |
16–30 min | 1 |
31–60 min | 2 |
> 60 min | 3 |
Response to Q5a | Component 2/Q5a subscore |
Not during past month | 0 |
Less than once a week | 1 |
Once or twice a week | 2 |
Three or more times a week | 3 |
Sum of Q2 and Q5a subscores | Component 2 score |
0 | 0 |
1–2 | 1 |
3–4 | 2 |
5–6 | 3 |
Component 3: Sleep duration—question 4 | |
Background | |
> 7 h | 0 |
6–7 h | 1 |
5–6 h | 2 |
< 5 h | 3 |
Component 4: Sleep efficiency-questions 1, 3, and 4 | |
Sleep efficiency = (# hours slept* hours in bed) × 100% | |
# hours slept—question 4 | |
# hours in bed—calculated from responses to questions 1 and 3 | |
Sleep efficiency | Component 4 score |
> 85% | |
75–84% | |
65–74% | |
< 65% | |
Component 5: Sleep disturbance—questions 5b-5j | |
Questions 5b to 5i should be scored as follows: | |
Not during past month | 0 |
Less than once a week | 1 |
Once or twice a week | 2 |
Three or more times a week | 3 |
Sum of 5b lo 51 scores | Component 5 score |
0 | 0 |
1–9 | 1 |
10–18 | 2 |
9–27 | 3 |
Component 6: Use of sleep medication—question 6 | |
Response to Q6 | Component 6 score |
Not during past month | 0 |
Less than once a week | 1 |
Once or twice a week | 2 |
Three or more times a week | 3 |
Component 7: Daytime dysfunction—questions 7 and 8 | |
Response to Q7 | Component 7/ Q7 sub score |
Not during past month | 0 |
Less than once a week | 1 |
Once or twice a week | 2 |
Three or more times a week | 3 |
Response lo Q8 | Component7/Q8 sub score |
No problem at all | 0 |
Only a very slight problem | 1 |
Somewhat of a problem | 2 |
A very big problem | 3 |
Sum of Q7 and Q8 sub scores | Component 7 score |
0 | 0 |
1–2 | 1 |
3–4 | 2 |
5–6 | 3 |