Table 1.
Demographics of Survey Recipients from AMA Masterfile Data.
| Respondents | Non- Respondents |
Non- Contacts |
Total Population |
|
|---|---|---|---|---|
| No. subjects | 254a | 207a | 2690 | 3151 |
| Median age (IQR)b | 45(38–53) | 48(40–58) | 48(40–57) | 48(40–57) |
| % Male | 40 | 46 | 43 | 43 |
| Geographic region, n(%) | ||||
| Northeast | 68(27) | 49(24) | 644(24) | 761(24) |
| Midwest | 43(17) | 35(17) | 501(19) | 579(18) |
| South | 73(29) | 65(31) | 943(35) | 1081(34) |
| West | 70(28) | 58(28) | 602(22) | 730(23) |
| Practice type, n(%) | ||||
| Office based | 221(87) | 181(88) | 2319(86) | 2721(86) |
| Hospital staff | 32(13) | 23(11) | 307(11) | 362(12) |
| Medial teaching | 1(.4) | 2(1) | 64(2) | 67(2) |
a
10 subjects in this table listed as “respondents” are mis-classified and treated as “non-respondents” in the remainder of the paper. This misclassification is due to 10 subjects clicking the link to open the survey, but not starting the survey. Respondent n=244 and non-respondent n=217 have been used for response rate calculation and for all other calculations presented in this study.
b
Median age was significantly different between the groups (p=.005). The groups were similar with respect to sex, geographic region, and practice type.