Table 1.
A(H1N1)pdm09-positive patient demographics from the NPFS and sentinel GP schemes
| Patient demographic | NPFS scheme, n (%) (n = 1934 swabs) | Sentinel GP scheme, n (%) (n = 1021 swabs) |
|---|---|---|
| Method of swab | self-taken (or parent/guardian) | taken by healthcare professional |
| Treatment status at time of swab | ||
| no oseltamivir taken | 631 (32.6) | 935 (91.6) |
| mid-oseltamivir treatment (days 1–4) | 1195 (61.8) | 19a (1.9)b |
| oseltamivir treatment completed (day 5+) | 78 (4.0) | |
| no information given | 30 (1.6) | 67 (6.6) |
| Interval between onset date and swab date | ||
| 0 to 1 day | 3 (0.2) | 249 (24.4) |
| 2–3 days | 773 (40.0) | 338 (33.1) |
| 4–5 days | 847 (43.8) | 189 (18.5) |
| 6–7 days | 198 (10.2) | 62 (6.1) |
| 8–9 days | 38 (2.0) | 21 (2.1) |
| 10+ days | 16 (0.8) | 36 (3.5) |
| no onset/swab date given | 59 (3.1) | 126 (12.3) |
| Gender | ||
| female | 1082 (55.9) | 538 (52.7) |
| Age group (years) | ||
| 0–4c | 0 (0) | 124 (12.1) |
| 5–14 | 413 (21.4) | 366 (35.9) |
| 15–24 | 390 (20.2) | 179 (17.5) |
| 25–44 | 779 (40.3) | 248 (24.3) |
| 45–64 | 338 (17.5) | 96 (9.4) |
| 65–74 | 14 (0.7) | 5 (0.5) |
| 75+ | 0 (0) | 3 (0.3) |
| Region | ||
| East Midlands | 223 (11.5) | 96 (9.4) |
| East of England | 233 (12.0) | 103 (10.1) |
| London | 203 (10.5) | 275 (26.9) |
| North East England | 162 (8.4) | 33 (3.2) |
| North West England | 215 (11.1) | 71 (7.0) |
| South East England | 250 (12.9) | 160 (15.7) |
| South West England | 232 (12.0) | 112 (11.0) |
| West Midlands England | 214 (11.1) | 134 (13.1) |
| Yorkshire and Humber England | 202 (10.4) | 37 (3.6) |
aTwo patients had received zanamivir at the time of swabbing, and two patients had not received antivirals but were household contacts of someone receiving oseltamivir.
bFor sentinel GP swabs, the interval from the start of treatment to the swab date was not known, and therefore these 19 patients cannot be separated into the 1–4 day or 5+ day groups.
cThe 0–4 year age group was excluded from the NPFS virological surveillance protocol.