Table 1

Resource use, unit cost and mean cost per participant for primary and secondary care services postrandomisation

nUsual care10TTUnit cost (£)Usual care10TTIncremental difference
 Mean (SD)Median (IQR)Mean (SD)Median (IQR)Mean cost (£)Mean cost (£)Mean (£)(95% CI)
No imputation for missing values
GP surgery visit2049.4 (8.4)7 (7.00)9.7 (9.5)7 (9.00)454174258(−72 to 89)
GP home visit1960.1 (0.8)0 (0.00)0.0 (0.1)0 (0.00)292379−27(−61 to 7)
GP phone1991.3 (3.0)0 (1.00)1.3 (3.0)0 (1.00)2734340(−16 to 16)
GP practice nurse2066.9 (8.4)4 (6.00)6.8 (9.5)4 (6.50)40274268−6(−77 to 64)
Nurse home visit1950.1 (1.1)0 (0.00)0.0 (0.1)0 (0.00)7051−4(−16 to 7)
GP practice nurse phone1970.5 (2.3)0 (0.00)0.4 (1.2)0 (0.00)1054−1(−5 to 2)
Dietitian1950.1 (0.5)0 (0.00)0.1 (0.8)0 (0.00)35440(−4 to 4)
Additional nurse visit1971.1 (3.1)0 (1.00)1.6 (2.6)0 (1.00)445440(−23 to 22)
Inpatient admission1960.2 (0.7)0 (0.00)0.2 (0.7)0 (0.00)171337238714(−220 to 249)
Outpatient clinic2002.2 (3.5)1 (3.00)2.1 (3.3)1 (3.00)135288269−20(−110 to 70)
Accident and emergency visit1990.4 (1.2)0 (0.00)0.4 (0.9)0 (1.00)17765672(−36 to 39)
Other outpatient services1941.0 (1.8)0 (1.00)1.0 (2.3)0 (1.00)1351241295(−48 to 58)
Missing values imputed*  SE  SE
GP surgery visit2709.4 (0.6)99.4 (0.7)9454194201(−79 to 81)
GP home visit2700.1 (0.5)00.0 (0.2)02923613−23(−58 to 12)
GP phone2701.3 (0.2)11.3 (0.2)1273533−2(−19 to 14)
GP practice nurse2706.9 (0.6)66.6 (0.7)640274266−9(−75 to 57)
Nurse home visit2700.1 (1.0)00.0 (0.1)07062−4(−16 to 7)
GP practice nurse phone2700.5 (0.6)00.4 (0.1)01054−1(−5 to 2)
Dietitian2700.1 (0.0)00.1 (0.6)035440(−4 to 4)
Additional nurse visit2701.2 (0.2)11.8 (0.2)0446470(−23 to 23)
Inpatient admission2700.2 (0.1)00.2 (0.1)017133733796(−238 to 251)
Outpatient clinic2702.1 (0.3)22.0 (0.2)0135287266−22(−106 to 63)
Accident and emergency visit2700.4 (0.9)00.4 (0.7)017767692(−38 to 42)
Other outpatient services2701 (0.1)11 (0.2)01351221296(−52 to 65)
Weight-loss interventions
10TT23
Weight Watchers78
Slimming World93
Size Down Programme73
  • Costs are in 2013/2014 UK£.

  • SD for non-imputed data. SE for imputed data.

  • *Missing values imputed using multiple imputation with 20 imputed data sets (see text).

  • 10TT, Ten Top Tips; GP, general practitioner.