Trying smoking is OK* (don’t know=not OK) | Smoking weekly is OK† (don’t know=not OK) | ||||||||
Linear | P value | Quadratic | P value | Linear | P value | Quadratic | P value | ||
Whole sample (n=165 199; 35 890) | Year | 0.91 (0.91 to 0.92) | <0.001 | 0.87 (0.85 to 0.89) | <0.001 | 0.91 (0.90 to 0.92) | <0.001 | 0.72 (0.65 to 0.81) | <0.001 |
Year2 | – | – | 1.00 (1.00 to 1.00) | <0.001 | – | – | 1.01 (1.01 to 1.02) | <0.001 | |
Level | 1.03 (0.97 to 1.10) | 0.330 | 1.05 (0.98 to 1.12) | 0.143 | 1.15 (1.00 to 1.32) | 0.045 | 1.10 (0.96 to 1.27) | 0.152 | |
Post-slope | 0.92 (0.90 to 0.93) | <0.001 | 0.88 (0.86 to 0.90) | <0.001 | 0.95 (0.90 to 1.00) | 0.032 | 0.82 (0.75 to 0.89) | <0.001 | |
Male only subgroup (n=82 270; 18 042) | Year | 0.92 (0.91 to 0.93) | <0.001 | 0.84 (0.81 to 0.87) | <0.001 | 0.92 (0.91 to 0.94) | <0.001 | 0.67 (0.57 to 0.79) | <0.001 |
Year2 | – | – | 1.01 (1.00 to 1.01) | <0.001 | – | – | 1.02 (1.01 to 1.03) | <0.001 | |
Level | 1.08 (0.99 to 1.18) | 0.090 | 1.11 (1.01 to 1.22) | 0.024 | 1.33 (1.10 to 1.62) | 0.004 | 1.27 (1.04 to 1.54) | 0.020 | |
Post-slope | 0.91 (0.89 to 0.93) | <0.001 | 0.84 (0.81 to 0.88) | <0.001 | 0.88 (0.82 to 0.94) | <0.001 | 0.71 (0.62 to 0.81) | <0.001 | |
Female only subgroup (n=82 929; 17 848) | Year | 0.90 (0.90 to 0.91) | <0.001 | 0.89 (0.86 to 0.93) | <0.001 | 0.90 (0.88 to 0.91) | <0.001 | 0.77 (0.66 to 0.91) | 0.001 |
Year2 | – | – | 1.00 (1.00 to 1.00) | 0.492 | – | – | 1.01 (1.00 to 1.02) | 0.067 | |
Level | 0.98 (0.90 to 1.07) | 0.718 | 0.99 (0.90 to 1.08) | 0.789 | 1.02 (0.84 to 1.22) | 0.866 | 0.99 (0.82 to 1.19) | 0.917 | |
Post-slope | 0.93 (0.91 to 0.95) | <0.001 | 0.92 (0.88 to 0.95) | <0.001 | 1.01 (0.95 to 1.08) | 0.720 | 0.92 (0.81 to 1.04) | 0.180 | |
13 year olds only (n=85 713; 18 721) | Year | 0.90 (0.89 to 0.91) | <0.001 | 0.89 (0.86 to 0.92) | <0.001 | 0.90 (0.89 to 0.92) | <0.001 | 0.78 (0.65 to 0.94) | 0.007 |
Year2 | – | – | 1.00 (1.00 to 1.00) | 0.459 | – | – | 1.01 (1.00 to 1.02) | 0.107 | |
Level | 0.95 (0.86 to 1.05) | 0.321 | 0.95 (0.87 to 1.05) | 0.349 | 1.22 (0.97 to 1.53) | 0.086 | 1.19 (0.94 to 1.49) | 0.145 | |
Post-slope | 0.94 (0.92 to 0.97) | <0.001 | 0.93 (0.90 to 0.97) | <0.001 | 0.93 (0.85 to 1.01) | 0.092 | 0.84 (0.73 to 0.98) | 0.022 | |
15 year olds only (n=79 486; 17 169) | Year | 0.93 (0.92 to 0.94) | <0.001 | 0.86 (0.83 to 0.89) | <0.001 | 0.91 (0.90 to 0.93) | <0.001 | 0.70 (0.60 to 0.80) | <0.001 |
Year2 | – | – | 1.00 (1.00 to 1.01) | <0.001 | – | – | 1.01 (1.01 to 1.02) | <0.001 | |
Level | 1.09 (1.01 to 1.19) | 0.034 | 1.13 (1.04 to 1.23) | 0.006 | 1.11 (0.94 to 1.32) | 0.218 | 1.06 (0.90 to 1.26) | 0.473 | |
Post-slope | 0.89 (0.87 to 0.91) | <0.001 | 0.83 (0.80 to 0.86) | <0.001 | 0.96 (0.90 to 1.02) | 0.144 | 0.80 (0.71 to 0.89) | <0.001 |
*Available for England and Scotland only.
†Available for England only.