“…In two of these (Deschamps et al, 1992;Stambaugh et al, 2001), the description was restricted to the location of the pain. Five trials (Hays et al, 1994;Bruera et al, 1996Bruera et al, , 1998Bruera et al, , 2004Hagen and Babul, 1997) evaluated patients using the Edmonton staging system which classifies pain as visceral, Kaplan et al (1998) 180 (M) Parallel group 6 days 16 (9%) VRSpi 4 11 0/spontaneous report of nervousness, anxiety 20 Klepstad et al (2003) 40 (S) Parallel group p7 days 6 (15%) VASpi; VRSpi 5 11 'Loss of sleep'; HRQOL/HRQOL: ND; sleep data NR 21 Knudsen et al (1985) 18 (S) Crossover 14 days 2 (11%) VASpi 4 10 22 Lauretti et al (2003) 26 (S) Crossover X35 days 4 (11%) VASpi 4 10 23 Melzack et al (1979) 44 (S) Crossover 'About' 4 weeks 14 (32%) PPI 4 9 24 Mignault et al (1995) 19 (S) Crossover 10 days 8 (42%) VASpi; VASpr 4 7 25 Moriarty et al (1999) 100 ( Parris et al (1998) 111 (M) Parallel group 5 days 37 (33%) VRSpi 4 16 29 Portenoy et al (1989) 51 (S) Parallel group Max. 5 days 2 (4%) VRSpi 4 11 'Quality of sleep'/ND 30 Stambaugh et al (2001) 30 (S) Crossover Max.…”