Table 1.
Frequency and independent predictors of missing b or inconsistent smoking data in primary care recordsc
| Missing tobacco consumption unitsb in primary care data (all invited current smokers, n=48,518) |
Inconsistent smoking status valuesc in primary care data (all invited, n=95,297) |
|||||
|---|---|---|---|---|---|---|
| Affected 19,576 (40.3%) | Unadjusted OR (95% CI) | Adjusted OR (95% CI) | Affected 9,826 (10.3%) | Unadjusted OR (95% CI) | Adjusted OR (95% CI) | |
| Sex | ||||||
| Female | 7,827 (40.8) | 1.0 | 1.0 | 5,232 (13.2) | 1 | 1 |
| Male | 11,749 (40.0) | 0.97 (0.93 – 1.00) p=0.085 |
0.9 (0.95 – 1.03) p=0.521 |
4,594 (8.3) | 0.60 (0.57 – 0.62) p<0.001 |
0.45 (0.43 – 0.47) p<0.001 |
| Missinga | 0 | - | - | 1 | - | - |
| Age groups | ||||||
| 55-59 | 8,070 (40.7) | 1.0 | 1.0 | 3,216 (9.2) | 1 | 1 |
| 60-64 | 5,397 (40.5) | 0.99 (0.95 – 1.04) p=0.779 |
0.99 (0.95 – 1.04) p=0.722 |
2,456 (9.8) | 1.07 (1.01 – 1.13) p=0.026 |
1.08 (1.02 – 1.14) p=0.013 |
| 65-69 | 3,305 (40.5) | 0.99 (0.94 – 1.04) p=0.702 |
0.98 (0.92 – 1.03) p=0.375 |
2,020 (11.5) | 1.28 (1.20 - 1.36) p<0.001 |
1.38 (1.29 – 1.47) p<0.001 |
| 70-75 | 2,079 (39.1) | 0.94 (0.88 – 1.00) p=0.038 |
0.90 (0.84 – 0.96) p=0.001 |
1,487 (11.6) | 1.30 (1.21 – 1.38) p<0.001 |
1.63 (1.51 – 1.75) p<0.001 |
| >75 | 718 (38.2) | 0.90 (0.82 – 0.99) p=0.033 |
0.89 (0.81 - 0.99) p=0.03 |
646 (13.0) | 1.47 (1.34 – 1.60) p<0.001 |
1.74 (1.58 – 1.92) p<0.001 |
| Missing | 15 | - | - | 28 | - | - |
| Ethnicity | ||||||
| White | ||||||
| British/mixed British | 8,616 (41.0) | 1.0 | 1.0 | 2,834 (6.7) | 1 | 1 |
| Irish | 557 (39.0) | 0.92 (0.82 – 1.03) p=0.138 |
0.93 (0.83 – 1.04) p=0.175 |
141 (4.9) | 0.73 (0.61 – 0.86) p<0.001 |
0.73 (0.61 – 0.87) p<0.001 |
| Other White | 3,424 (41.2) | (0.96 – 1.06) p=0.731 |
(0.95 – 1.05) p=0.955 |
1,181 (8.1) | 1.24 (1.16 – 1.33) p<0.001 |
1.34 (1.25 – 1.44) p<0.001 |
| Asian or Asian British | ||||||
| Indian or British Indian | 542 (42.1) | 1.05 (0.82 – 1.26) p=0.420 |
1.03 (0.92 – 1.16) p=0.612 |
702 (22.9) | 4.15 (3.78 – 4.55) p<0.001 |
5.86 (5.30 – 6.46) p<0.001 |
| Pakistani or British Pakistani | 305 (37.9) | 0.88 (0.76 – 1.02) p=0.086 |
0.88 (0.76 – 1.02) p=0.084 |
374 (21.6) | 3.86 (3.42 – 4.35) p<0.001 |
5.85 (5.16 – 6.63) p<0.001 |
| Bangladeshi or British Bangladeshi | 365 (18.8) | 0.33 (0.29 – 0.37) p<0.001 |
0.34 (0.30 – 0.38) p<0.001 |
1623 (33.8) | 7.16 (6.67 – 7.69) p<0.001 |
9.79 (9.07 – 10.57) p<0.001 |
| Other Asian | 393 (40.1) | 0.96 (0.85 – 1.10) p=0.57 |
0.97 (0.85 – 1.10) p=0.623 |
338 (16.2) | 2.70 (2.39 – 3.05) p<0.001 |
3.46 (3.05 – 3.93) p<0.001 |
| Black | ||||||
| Caribbean | 1,028 (41.8) | 1.04 (0.95 – 1.13) p=0.428 |
1.05 (0.96 – 1.15) p=0.258 |
516 (11.6) | 1.84 (1.67 – 2.03) p<0.001 |
2.23 (2.02 – 2.48) p<0.001 |
| African | 440 (41.0) | 1.00 (0.88 – 1.13) p=0.997) |
1.02 (0.90 – 1.15) p=0.258 |
571 (22.2) | 4.00 (3.62 – 4.43) p<0.001 |
5.60 (5.04 – 6.22) p<0.001 |
| Other black | 434 (38.5) | 0.90 (0.80 – 1.02) p=0.106 |
1.02 (0.90 – 1.15) p=0.802 |
207 (10.5) | 1.64 (1.41 – 1.90) p<0.001 |
2.14 (1.85 – 2.50) p<0.001 |
| Mixed | ||||||
| White and black Caribbean | 182 (47.4) | 1.30 (1.06 – 1.60) p=0.011 |
1.30 (1.06 – 1.59) p=0.011 |
61 (9.5) | 1.48 (1.13 – 1.93) p=0.004 |
1.69 (1.29 – 2.21) p<0.001 |
| White and black African | 66 (38.8) | 0.91 (0.67 – 1.25) p=0.570 |
0.93 (0.68 – 1.27) p=0.647 |
47 (15.0) | 2.47 (1.81 – 3.38) p<0.001 |
3.13 (2.27 – 4.30) p<0.001 |
| White and Asian | 80 (44.9) | 1.18 (0.87 – 1.58) p=0.284 |
1.12 (0.83 – 1.51) p=0.462 |
33 (10.2) | 1.60 (1.11 – 2.23) p=0.011 |
1.79 (1.23 – 2.59) p=0.002 |
| Mixed – other | 148 (41.3) | 1.02 (0.82 – 1.26) p=0.889 |
1.03 (0.83 – 1.27) p=0.797 |
64 (9.2) | 1.42 (1.09 – 1.84) p=0.009 |
1.56 (1.19 – 2.03) p=0.001 |
| Other | ||||||
| Chinese | 122 (36.7) | 0.84 (0.67 – 1.05) p=0.121) |
0.91 (0.80 – 1.03) p=0.129 |
79 (11.9) | 1.89 (1.49 – 2.40) p<0.001 |
2.32 (1.82 – 2.96) p<0.001 |
| Other | 919 (41.5) | 1.02 (0.94 – 1.12) p=0.627 |
0.81 (0.65 – 1.02) p=0.074 |
459 (11.0) | 1.74 (1.57 – 1.93) p<0.001 |
2.00 (1.79 – 2.22) p<0.001 |
| Not stated | 343 (42.9) | 1.08 (0.94 – 1.25) p=0.283 |
1.02 (0.93 – 1.11) p=0.725 |
153 (9.8) | 1.53 (1.29 – 1.81) p<0.001 |
1.63 (1.37 – 1.94) p<0.001 |
| Missing | 3,638 | - | - | 6,387 | - | - |
| National Index of Multiple Deprivation | ||||||
| Quintile 1 (most deprived) | 7,453 (38.5) | 1 | 1 | 3,753 (10.6) | 1 | 1 |
| Quintile 2 | 6,097 (40.8) | 1.10 (1.06 – 1.15) p<0.001 |
1.08 (1.04 – 1.13) p=0.001 |
3,003 (10.4) | 0.97 (0.93 – 1.02) p=0.29 |
1.06 (1.01 - 1.12) p=0.025 |
| Quintile 3 | 3,098 (42.1) | 1.16 (1.10 – 1.23) p<0.001 |
1.12 (1.06 – 1.19) p<0.001 |
1,424 (9.3) | 0.87 (0.81 – 0.92) p<0.001 |
1.03 (0.96 - 1.10) p=0.475 |
| Quintile 4 | 2,060 (42.2) | 1.17 (1.09 – 1.24) p<0.001 |
1.12 (1.05 – 1.20) p=0.001 |
1,102 (10.0) | 0.94 (0.87 – 1.00) p=0.61 |
1.22 (1.13 – 1.32) p<0.001 |
| Quintile 5 (least deprived) | 649 (43.2) | 1.21 (1.09 – 1.35) p<0.001 |
1.18 (1.05 – 1.33) p=0.005 |
447 (11.8) | 1.13 (1.02 – 1.25) p-0.023 |
1.53 (1.36 – 1.72) p<0.001 |
| Missing | 488 | - | - | 1,015 | - | - |
a
Numbers with missing data relate to all included individuals (n = 48,518 and 95,297).
b
Missing tobacco consumption data defined as absence of recorded tobacco consumption units (e.g. cigarettes per day, grams of tobacco per week) in those with most recent smoking status recorded as “current smoker”.
c
Inconsistent smoking status data defined as most recent smoking status recorded as “never smoker” plus previous documentation as either current or former smoker in primary care record.