Table 1.
Demographics against data availability
| n | Data availability | χ 2 | p | |||
|---|---|---|---|---|---|---|
| No CP data (%) | CP data but <6 outcomes (%) | 6+ outcomes plus CP data (%) | ||||
| Gender | 93.7 | <0.001 | ||||
| Male | 7,220 | 3,583 (53.0) | 2,180 (55.3) | 1,457 (44.5) | ||
| Female | 6,756 | 3,175 (47.0) | 1,762 (44.7) | 1,819 (55.5) | ||
| Housing tenure | 864.6 | <0.001 | ||||
| Mortgaged/owned | 9,559 | 3,674 (61.6) | 3,089 (80.3) | 2,796 (87.0) | ||
| Private rented | 1,384 | 825 (13.8) | 333 (8.7) | 226 (7.0) | ||
| Subsidized rented | 2,082 | 1,465 (24.6) | 425 (11.1) | 192 (6.0) | ||
| Parity | 96.5 | <0.001 | ||||
| First born | 5,770 | 2,475 (42.0) | 1,713 (44.7) | 1,582 (49.4) | ||
| Second born | 4,539 | 2,028 (34.4) | 1,389 (36.2) | 1,122 (35.0) | ||
| Third born plus | 2,618 | 1,388 (23.6) | 731 (19.1) | 499 (15.6) | ||
| Home overcrowding | 237.1 | <0.001 | ||||
| ≤1 person/room | 11,924 | 5,200 (89.4) | 3,637 (95.7) | 3,087 (97.0) | ||
| >1 person/room | 878 | 616 (10.6) | 165 (4.3) | 97 (3.1) | ||
| Maternal education | 875.3 | <0.001 | ||||
| A level or higher | 4,392 | 1,322 (24.7) | 1,442 (37.7) | 1,628 (50.3) | ||
| O-level | 4,296 | 1,789 (33.5) | 1,418 (37.1) | 1,089 (33.6) | ||
| <O-level | 3,728 | 2,238 (41.8) | 967 (25.3) | 523 (16.1) | ||
| Household income | 355.2 | <0.001 | ||||
| Top 20 % | 1,992 | 932 (29.5) | 693 (18.8) | 367 (11.9) | ||
| Middle 60 % | 5,937 | 1,782 (56.3) | 2,220 (60.2) | 1,935 (62.7) | ||
| Lowest 20 % | 2,010 | 449 (14.2) | 777 (21.1) | 784 (25.4) | ||
| Social class | 345.5 | <0.001 | ||||
| Professional/managerial and technical | 6,339 | 2,183 (46.1) | 2,051 (56.5) | 2,105 (67.2) | ||
| Skilled non-manual or lower | 5,162 | 2,556 (53.9) | 1,580 (43.5) | 1,026 (32.8) | ||
| Marital status at enrolment | 380.4 | <0.001 | ||||
| Married (incl. divorced/widowed) | 10,586 | 4,404 (73.7) | 3,316 (85.9) | 2,866 (88.3) | ||
| Unmarried | 2,499 | 1,575 (26.3) | 544 (14.1) | 380 (11.7) | ||
| Maternal age at delivery | 851.7 | <0.001 | ||||
| <25 years | 3,337 | 2,274 (33.7) | 665 (16.9) | 398 (12.2) | ||
| 25–29 | 5,403 | 2,551 (37.8) | 1,612 (40.9) | 1,240 (37.9) | ||
| 30–34 | 3,850 | 1,432 (21.2) | 1,230 (31.2) | 1,188 (36.3) | ||
| 35+ | 1,386 | 501 (7.4) | 435 (11.0) | 450 (13.7) | ||