Table 5

Coefficients for preferences and class membership for 4 groups from latent class logit modelling (data pooled from patients in DCE1 and DCE2)

Latent Class Class 1: situation/living well Class 2: information Class 3: cost dominant Class 4: inconsistent
Coefficient95% CICoefficient95% CICoefficient95% CICoefficient95% CI
Preferences*
Information0.80(0.72 to 0.88) 1.95 (1.78 to 2.13) 0.24(0.14 to 0.35)0.01(−0.07 to 0.10)
Situation 2.08 (1.95 to 2.21) 0.98(0.84 to 1.12)0.31(0.18 to 0.44)0.18(0.08 to 0.28)
Living well 1.82 (1.70 to 1.94) 0.78(0.65 to 0.90)0.44(0.32 to 0.55)0.25(0.16 to 0.33)
Communication0.45(0.37 to 0.52)0.23(0.10 to 0.36)0.11(0.01 to 0.21)0.11(0.03 to 0.20)
Cost−0.06(−0.07 to −0.06)−0.05(−0.06 to −0.04) −0.25 (−0.27 to −0.23) 0.02(0.01 to 0.02)
Class membership†
Constant−0.77(−1.71 to 0.17)1.00(0.15 to 1.85)0.45(−0.38 to 1.27)
DCE2‡−0.21(−0.75 to 0.32)−0.02(−0.53 to 0.49)0.07(−0.40 to 0.54)
Relationship: Single§−0.16(−0.69 to 0.36)−0.37(−0.89 to 0.15)−0.10(−0.58 to 0.39)
Education: University¶0.20(−0.29 to 0.69)−0.05(−0.54 to 0.43)0.01(−0.44 to 0.46)
Job status: Not working**−0.18(−0.97 to 0.62)−0.08(−0.82 to 0.67)−0.30(−1.02 to 0.41)
Job status: Retired**−0.15(−0.72 to 0.43) −0.59 (−1.17 to −0.01) −0.81 (−1.36 to −0.27)
Job status: Disabled**0.31(−0.67 to 1.29)0.08(−0.82 to 0.99)−0.15(−1.00 to 0.70)
Perceived health: Fair††−0.05(−0.59 to 0.49)−0.44(−0.96 to 0.08)−0.09(−0.59 to 0.41)
Perceived health: Poor††−0.58(−1.33 to 0.16) −1.06 (−1.78 to −0.34) −0.45(−1.11 to 0.21)
Gender: Female‡‡−0.10(−0.61 to 0.42) −0.82 (−1.31 to −0.33) −0.62 (−1.08 to −0.16)
Income: £15 600-£31 1999 0.24(−0.46 to 0.95)−0.61(−1.22 to 0.01)−0.10(−0.70 to 0.50)
Income: £31200+§§0.40(−0.34 to 1.15) −1.15 (−1.88 to −0.43) −0.12(−0.78 to 0.53)
Income: Not prepared to say§§ 0.93 (0.08 to 1.78) −0.19(−1.02 to 0.64)−0.13(−1.03 to 0.78)
Class shareN%N%N%N%
Predicted membership28639.9%13719.1%12617.6%16823.4%
Data quality*
Serial Non-participation (n=12)000 12 100%
Dominance (n=84)1113.1%67.1%22.4% 65 77.4%
Response time (n=107)43.7%98.4% 46 43.0% 48 44.9%
  • *In the Preferences and Data quality sections, only the dominant values are highlighted in bold.

  • † In the Class membership section, statistically significant coefficients are highlighted in bold.

  • ‡Compared with DCE1.

  • §Compared with married/co-habiting.

  • ¶Compared with no university education.

  • **Compared with working.

  • ††‘Bad’ or ‘very bad’ self-rated health compared with ‘good’ or ‘very good’.

  • ‡‡Compared with male.

  • §§Compared with <£15 600 per annum.