Table 1.
Simulation results. For each condition, the estimated lower and upper cut-off values are averages over 1000 simulations, and converted to the original scale of CD4 count. The numbers in parentheses are standard errors.
| p | φ | true values
|
nonparametric estimate
|
semiparametric estimate
|
|||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| lower | upper | TMR | lower | upper | TMR | lower | upper | TMR | |||
| (A-1) | .15 | 0 | 65 | 65 | .15 | 70 (20) | 70 (20) | .148 | 0 (1) | 0 (1) | .150 |
| .2 | 0 | 230 | .09 | 29 (14) | 231 (5) | .086 | 0 (0) | 230 (5) | .086 | ||
| .4 | 0 | 348 | .05 | 25 (13) | 349 (6) | .051 | 0 (0) | 348 (6) | .051 | ||
| .25 | 0 | 125 | 125 | .24 | 128 (23) | 128 (23) | .237 | 79 (25) | 79 (25) | .240 | |
| .2 | 66 | 225 | .15 | 71 (21) | 228 (9) | .152 | 2 (8) | 214 (5) | .153 | ||
| .4 | 39 | 333 | .09 | 47 (20) | 336 (7) | .092 | 0 (0) | 329 (6) | .092 | ||
| .4 | 0 | 239 | 239 | .32 | 240 (28) | 240 (28) | .327 | 268 (13) | 268 (13) | .327 | |
| .2 | 177 | 288 | .23 | 192 (22) | 302 (22) | .233 | 212 (13) | 323 (14) | .234 | ||
| .4 | 149 | 378 | .15 | 148 (22) | 377 (22) | .153 | 153 (14) | 382 (14) | .152 | ||
| (A-2) | .15 | 0 | 130 | 130 | .14 | 132 (16) | 132 (16) | .135 | 35 (23) | 35 (23) | .147 |
| .2 | 72 | 268 | .07 | 71 (20) | 268 (6) | .075 | 0 (0) | 262 (5) | .075 | ||
| .4 | 57 | 373 | .04 | 59 (21) | 374 (6) | .045 | 0 (0) | 370 (5) | .045 | ||
| .25 | 0 | 176 | 176 | .21 | 178 (17) | 178 (17) | .209 | 148 (17) | 148 (17) | .212 | |
| .2 | 122 | 270 | .13 | 121 (17) | 269 (9) | .131 | 51 (28) | 247 (7) | .135 | ||
| .4 | 98 | 368 | .08 | 96 (18) | 368 (8) | .080 | 1 (3) | 351 (5) | .083 | ||
| .4 | 0 | 249 | 249 | .29 | 251 (20) | 251 (20) | .291 | 290 (10) | 290 (10) | .295 | |
| .2 | 200 | 312 | .20 | 203 (17) | 314 (15) | .201 | 236 (11) | 345 (11) | .204 | ||
| .4 | 167 | 394 | .13 | 169 (18) | 396 (15) | .130 | 177 (11) | 403 (10) | .130 | ||
|
| |||||||||||
| (B-1) | .15 | 0 | 0 | 0 | .15 | 27 (15) | 27 (15) | .150 | 0 (0) | 0 (0) | .150 |
| .2 | 0 | 220 | .10 | 20 (9) | 221 (5) | .095 | 0 (0) | 221 (5) | .095 | ||
| .4 | 0 | 338 | .05 | 18 (8) | 338 (6) | .056 | 0 (0) | 338 (6) | .055 | ||
| .25 | 0 | 45 | 45 | .25 | 69 (34) | 69 (34) | .251 | 45 (25) | 45 (25) | .250 | |
| .2 | 0 | 209 | .17 | 33 (19) | 211 (6) | .166 | 0 (2) | 209 (5) | .165 | ||
| .4 | 0 | 322 | .10 | 26 (14) | 323 (6) | .100 | 0 (0) | 322 (6) | .099 | ||
| .4 | 0 | 259 | 259 | .35 | 257 (34) | 257 (34) | .355 | 259 (15) | 259 (15) | .353 | |
| .2 | 215 | 321 | .26 | 206 (28) | 312 (29) | .259 | 207 (15) | 312 (15) | .258 | ||
| .4 | 159 | 379 | .17 | 148 (31) | 370 (30) | .171 | 149 (16) | 369 (15) | .170 | ||
| (B-2) | .15 | 0 | 241 | 241 | .13 | 241 (31) | 241 (31) | .127 | 242 (13) | 242 (13) | .126 |
| .2 | 99 | 383 | .05 | 103 (37) | 391 (19) | .047 | 97 (20) | 386 (11) | .047 | ||
| .4 | 0 | 619 | .01 | 38 (19) | 622 (14) | .011 | 0 (0) | 620 (13) | .010 | ||
| .25 | 0 | 344 | 344 | .16 | 345 (30) | 345 (30) | .165 | 345 (10) | 345 (10) | .164 | |
| .2 | 234 | 452 | .08 | 237 (22) | 455 (25) | .082 | 236 (10) | 454 (11) | .081 | ||
| .4 | 112 | 577 | .03 | 111 (33) | 581 (26) | .028 | 111 (13) | 578 (11) | .028 | ||
| .4 | 0 | 457 | 457 | .18 | 458 (30) | 458 (30) | .184 | 458 (9) | 458 (9) | .183 | |
| .2 | 344 | 564 | .10 | 347 (20) | 567 (30) | .100 | 347 (8) | 568 (12) | .100 | ||
| .4 | 237 | 671 | .05 | 240 (19) | 677 (38) | .047 | 239 (8) | 676 (13) | .046 | ||