Table 6 Sub-group mixed-logit analysis: age

Monthly fee (ref: > CNY4000)

 ≤ 2000

1.474*

0.569

(0.358, 2.590)

1.783***

0.400

(0.999, 2.567)

1.964

1.004

(-0.003, 3.931)

 2001–4000

1.541**

0.504

(0.553, 2.529)

1.653***

0.0385

(0.899, 2.407)

0.351

0.516

(-0.660, 1.362)

Distance (ref: >60 min)

 ≤ 30 min

1.098

0.560

(0.001, 2.196)

0.717**

0.273

(0.181, 1.252)

2.661

1.361

(-0.008, 5.329)

 31–60 min

0.530

0.482

(-0.415, 1.474)

1.008**

0.309

(0.402, 1.614)

0.992

0.657

(-0.296, 2.279)

Location(ref: suburb)

 Downtown

0.459

0.368

(-0.263, 1.180)

0.255

0.195

(-0.127, 0.638)

0.317

0.347

(-0.363, 0.998)

Medical facility (ref: no)

 Yes

2.607*

1.169

(0.316, 4.897)

1.625***

0.394

(0.852, 2.398)

1.993*

0.875

(0.278, 3.708)

Environment (ref: fair)

 Good

1.003*

0.458

(0.105, 1.900)

0.131

0.192

(-0.245, 0.507)

0.207

0.383

(-0.544, 0.958)

Nursing staff (ref: not professional)

 Professional

3.870**

1.319

(1.285, 6.456)

2.933***

0.615

(1.728, 4.138)

2.657*

1.045

(0.609, 4.704)

 Log likelihood

-328.258

-416.398

-131.940

 Sample size

89

110

34

 Observations

1424

1760

544