Response Rates

Medicare HOS Survey Status Information1
COHORT

DATE
REPORTING
SAMPLE INELIGIBLE
POPULATION
FIELDED
UNITS (MAOs)2 SIZE
SURVEYS3

COMPLETED
SURVEYS4

RESPONSE
RATE5

Cohort 1
Baseline

May
1998

M+CO

287

279,135

7,196

167,096

61.4%

Cohort 1
Follow
Up

April
2000

M+CO

188

89,332

1,203

75,593

85.8%

Cohort 2
Baseline

March
1999

M+CO
PACE
EverCare

312
20
6

301,184
4,225
5,015

8,829
435
655

194,378
1,752
1,226

66.5%
46.2%
28.1%

Cohort 2
Follow
Up

June
2001

M+CO

160

88,468

1,539

73,015

84.0%

Cohort 3
Baseline

April
2000

M+CO
PACE

306
20

298,883
3,831

7,662
564

208,655
1,672

71.6%
51.2%

Cohort 3
Follow
Up

May
2002

M+CO

146

87,091

1,523

65,992

77.1%

Cohort 4
Baseline

May
2001

M+CO
PACE

197
17

190,523
3,943

6,041
362

126,255
1,321

68.4%
36.9%

Cohort 4
Follow
Up

May
2003

M+CO

152

71,549

951

55,480

78.6%

Cohort 5
Baseline

April
2002

M+CO
PACE

177
20

171,504
4,834

5,963
710

106,168
1,385

64.1%
33.6%

Cohort 5
Follow
Up

May
2004

MA

153

74,562

1,265

58,417

80.0%

Cohort 6
Baseline

April
2003

M+CO

163

161,409

5,579

100,669

64.6%

Cohort 6
Follow
Up

May
2005

MA

154

69,865

854

56,075

81.3%

Cohort 7
Baseline

March
2004

MA

161

159,311

6,777

99,649

65.3%

Cohort 7
Follow
Up

May
2006

MA

151

70,022

1,084

57,214

83.0%

Cohort 8
Baseline

April
2005

MA

164

162,902

6,966

101,588

65.1%

Cohort 8
Follow
Up

May
2007

MA

154

66,292

1,351

53,112

81.8%

Cohort 9
Baseline

April
2006

MA

203

188,515

7,725

120,708

66.8%

Cohort 9
Follow
Up

May
2008

MA

187

77,669

819

62,875

81.8%

Cohort
10
Baseline

April
2007

MA

286

321,005

19,273

191,308

63.4%

Cohort
10
Follow
Up

May
2009

MA

268

114,405

2,026

93,286

83.0%

Cohort
11
Baseline

April
2008

MA

361

414,655

18,420

233,945

59.0%

Cohort
11
Follow
Up

May
2010

MA

330

114,733

901

96,106

84.4%

Cohort
12
Baseline

April
2009

MA

424

487,861

26,162

288,794

62.6%

Cohort
12
Follow
Up

May
2011

MA

382

142,030

1,330

106,056

75.4%

Cohort
13
Baseline

April
2010

MA

471

546,931

14,079

337,249

63.3%

Cohort
13
Follow
Up

May
2012

MA

432

168,801

1,669

123,247

73.7%

Cohort
14
Baseline

April
2011

MA

493

577,874

14,222

297,570

52.8%

Cohort
15
Baseline

April
2012

MA

506

591,823

13,602

297,974

51.5%

UPDATED August 2013

1

Over the course of time, the refinement of the HOS measure has resulted in changes to the definition
of a "completed survey." The information in the table provides a presentation of how a completed
survey and response rate were calculated at the time of reporting for each of the baseline and follow
up cohorts. Given that the definition of a completed survey has evolved over time, this table should not
be utilized for response rate comparisons across the cohorts. If you are interested in comparative
response rate information, please contact the Medicare HOS Information and Technical Support Line.

2

For the baseline cohorts, the reporting units represent the individual MAOs sampled for the survey.
However for the follow up cohorts, the reporting units have been adjusted to accommodate selected
MAO consolidations and service area reductions at the time of performance measurement reporting
(which typically occurs in the year subsequent to the collection of the follow up data).

3

For the baseline cohorts, the ineligible beneficiaries meet one of the following criteria: deceased; not
enrolled in the MAO; have an incorrect address and phone number; or have a language barrier. For the
follow up cohorts, the ineligible beneficiaries meet one of the following criteria: not enrolled in the
MAO; have an incorrect address and phone number; or have a language barrier.

4

In general, for Cohorts 1, 2, and 3 Baseline a completed survey is defined as a survey that has at
least 80% of the questions answered. However, beginning with Cohort 1 Follow Up and Cohort 4
Baseline, a completed survey is defined as a survey that can be used to calculate physical or mental
health summary scores.

5

Please note, ineligible beneficiaries are removed from the denominator in the response rate
calculations. In other words, Response Rate = [Number of Respondents/(Total Sample - Ineligibles)].