CHIRPP data 1996: sampling frames compared; values are per cent (95% confidence interval)
| Variable | Total population of injured children (n=7940) | Sample 1: every 10th attendance (n=794) | Sample 2: every eighth day (n=1032) | Sample 3: once a week (weekday) (n=1104) | Sample 4: once a week (weekend) (n=1123) | Sample 5: four months (Jan Apr, Jul, Oct) (n=2245) |
|---|---|---|---|---|---|---|
| *Statistically significant difference from total population. | ||||||
| Age (years) | ||||||
| 0–4 | 37 (36 to 38) | 39 (36 to 42) | 37 (34 to 40) | 37 (34 to 40) | 39 (36 to 42) | 39 (37 to 41) |
| 5–9 | 34 (33 to 35) | 31 (28 to 34) | 33 (30 to 36) | 33 (30 to 36) | 34 (31 to 37) | 33 (31 to 35) |
| 10–14 | 29 (29 to 30) | 30 (27 to 33) | 30 (27 to 33) | 30 (27 to 33) | 27 (24 to 30) | 28 (26 to 30) |
| Sex | ||||||
| Male | 58 (57 to 59) | 60 (57 to 63) | 56 (53 to 59) | 59 (56 to 62) | 59 (56 to 62) | 57 (55 to 59) |
| Female | 42 (41 to 43) | 40 (37 to 43) | 44 (41 to 47) | 41 (38 to 44) | 41 (28 to 44) | 43 (41 to 45) |
| Injury type | ||||||
| Cut/laceration | 21 (20 to 22) | 22 (19 to 25) | 19 (17 to 21) | 19 (17 to 21) | 20 (18 to 22) | 23 (21 to 25) |
| Haematoma/bruise | 19 (18 to 20) | 16 (14 to 19) | 20 (18 to 22) | 19 (17 to 21) | 19 (17 to 21) | 17 (15 to 19) |
| Fracture | 13 (12 to 14) | 11 (10 to 12) | 11 (9 to 13) | 13 (11 to 15) | 11 (9 to 13) | 13 (12 to 14) |
| Inflamation/oedema | 12 (11 to 13) | 14 (12 to 16) | 13 (11 to 15) | 14 (12 to 16) | 13 (11 to 15) | 13 (12 to 14) |
| Sprain/strain | 12 (11 to 13) | 11 (10 to 12) | 11 (9 to 13) | 10 (8 to 12) | 12 (10 to 12) | 12 (11 to 13) |
| Injury location | ||||||
| Own home | 42 (41 to 43) | 42 (38 to 46) | 42 (39 to 45) | 44 (41 to 47) | 46 (43 to 49) | 45 (43 to 47) |
| Public footpath | 18 (17 to 19) | 17 (14 to 20) | 15 (13 to 17) | 16 (14 to 18) | 20 (18 to 22) | 20 (18 to 22) |
| School playground | 8 (7 to 9) | 7 (5 to 9) | 9 (7 to 11) | 9 (7 to 11) | 0* | 3* (2 to 4) |
| Other home | 6 (5 to 7) | 6 (4 to 8) | 6 (5 to 7) | 5 (4 to 6) | 6 (5 to 7) | 6 (5 to 7) |
| Public playground | 6 (5 to 7) | 6 (4 to 8) | 6 (5 to 7) | 5 (4 to 6) | 8 (6 to 10) | 7 (6 to 8) |
| Activity | ||||||
| Playing | 67 (66 to 68) | 68 (65 to 71) | 64 (61 to 67) | 66 (63 to 69) | 70 (67 to 73) | 73* (71 to 75) |
| Walk/run/crawl | 16 (15 to 17) | 14 (12 to 16) | 16 (14 to 18) | 16 (14 to 18) | 14 (12 to 16) | 15 (13 to 17) |
| Informal sport | 5 (5 to 5) | 5 (3 to 7) | 6 (5 to 7) | 5 (4 to 6) | 4 (3 to 5) | 5 (4 to 6) |
| Body part injured | ||||||
| Head | 39 (38 to 40) | 40 (36 to 44) | 39 (36 to 42) | 40 (38 to 42) | 39 (36 to 42) | 38 (36 to 40) |
| Upper extremities | 35 (34 to 36) | 38 (35 to 41) | 35 (32 to 38) | 36 (34 to 38) | 35 (32 to 38) | 35 (33 to 37) |
| Lower extremities | 21 (20 to 22) | 19 (16 to 22) | 21 (19 to 23) | 21 (19 to 23) | 21 (19 to 23) | 23 (21 to 25) |