Table 3 Focus group and cognitive interview sample description – self-reported sleep disturbances in the past week

Sleep disturbance in the past week

6.4 (1.9);

7.4 (1.4);

(“0 “no sleep disturbance” to 10 “worst possible”)

(1, 10)

(6, 10)

Pain in the past week

6.9 (1.8);

7.3 (1.7);

(“0” no pain to “10” worst possible pain)

(2, 10)

(3, 10)

Tiredness in the past week

7.4 (1.8);

7.6 (1.7);

(0”not tired to “10” extremely tired)

(2, 10)

(4, 10)

Time taken to fall asleep last night (in minutes)

74.5 (69.4);

118.7 (147.4);

(5, 240)

(5, 600)

Time spent sleeping last night (in minutes)

324.0 (76.8);

224 (122.7);

(180, 510)

(0, 510)

Number of times awoken last night, (mean, sd)

2.5 (1.5);

3.3 (2.1);

(0, 5)

(0, 6)

Time spent awake after falling asleep last night (in minutes)

71.4 (166.2);

154 (127.9);

(0, 960)

(0, 390)

Quality of sleep

5.1 (2.3);

2.7 (2.3);

(“0” very poor to “10” excellent)

(0, 10)

(0, 6)