Table 1.

Mean hours of sleep both before and after surgery.

Day	Mean hours (range) of sleep in a 24 h period	Mean hours (range) of daytime/afternoon sleep
1 (Pre-Op)	7.43 (2.0–10.5)	0.25 (0.0–2.0)
2	7.16 (1.0–14.0)	0.75 (0.0–5.0)
3	7.8 (3.0–11.0)	0.67 (0.0–3.0)
4	6.71 (3.0–11.0)	0.75 (0.0–4.0)
5	6.28 (3.5–10.0)	0.50 (0.0–3.0)
6	6.97 (1.25–13.0)	0.50 (0.0–2.5)
7	6.05 (1.0–9.0)	0.50 (0.0–1.5)