|  | 1 h increase in total screen time | p-value | ≤1 h | 1- ≤ 4 h (reference) | 4- ≤ 8 h | > 8 h |
---|---|---|---|---|---|---|---|
Person-years | Â | 3,474,425 | Â | 254,147 | 2,111,765 | 997,699 | 110,815 |
Skin, melanoma | Cases | 1614 | Â | 101 | 960 | 504 | 49 |
HR (95% CI)* | 0.99 (0.97 1.02) | 0.64** | 0.93 (0.76 1.14) | 1.00 | 1.02 (0.91 1.13) | 0.98 (0.73 1.30) | |
 | HR (95% CI)†| 1.01 (0.98 1.03) | 0.62 | 0.97 (0.78 1.19) | 1.00 | 1.07 (0.96 1.20) | 1.06 (0.78 1.44) |
 | HR (95% CI)a | 1.01 (0.98 1.03) | 0.70 | 0.99 (0.80 1.22) | 1.00 | 1.07 (0.95 1.19) | 1.07 (0.79 1.45) |
Oropharyngeal | Cases | 552 | Â | 24 | 312 | 191 | 25 |
 | HR (95% CI)* | 1.05 (1.01 1.09) | 0.009 | 0.69 (0.46 1.05) | 1.00 | 1.18 (0.99 1.42) | 1.39 (0.92 2.09) |
 | HR (95% CI)†| 1.02 (0.98 1.06) | 0.41 | 0.69 (0.45 1.04) | 1.00 | 1.10 (0.91 1.32) | 1.09 (0.71 1.67) |
 | HR (95% CI) | 1.02 (0.98 1.06) | 0.41 | 0.69 (0.45 1.04) | 1.00 | 1.10 (0.91 1.32) | 1.09 (0.71 1.67) |
Lung | Cases | 2014 | Â | 119 | 995 | 774 | 126 |
HR (95% CI)* | 1.11 (1.09 1.13) | < 0.001** | 1.13 (0.93 1.37) | 1.00 | 1.37 (1.25 1.50) | 2.49 (2.07 3.00) | |
 | HR (95% CI)†| 1.02 (1.003 1.04) | 0.03** | 1.13 (0.92 1.38) | 1.00 | 1.05 (0.95 1.16) | 1.42 (1.16 1.72) |
 | HR (95% CI)h | 1.03 (1.004 1.05) | 0.02** | 1.12 (0.91 1.37) | 1.00 | 1.05 (0.95 1.16) | 1.45 (1.19 1.77) |
Breast (female only) | Cases | 5609 | Â | 418 | 3526 | 1522 | 143 |
HR (95% CI)* | 1.01 (0.996 1.02) | 0.16** | 0.91 (0.82 1.004) | 1.00 | 0.97 (0.92 1.04) | 1.08 (0.91 1.27) | |
 | HR (95% CI)†| 1.003 (0.99 1.02) | 0.64** | 0.94 (0.85 1.04) | 1.00 | 0.95 (0.90 1.02) | 1.08 (0.91 1.29) |
 | HR (95% CI)b, h | 1.01 (0.99 1.02) | 0.37** | 0.93 (0.83 1.04) | 1.00 | 0.97 (0.90 1.04) | 1.11 (0.92 1.34) |
Uterus | Cases | 856 | Â | 70 | 504 | 264 | 18 |
 | HR (95% CI)* | 1.03 (0.99 1.06) | 0.14 | 1.11 (0.87 1.43) | 1.00 | 1.12 (0.96 1.30) | 0.99 (0.62 1.58) |
 | HR (95% CI)†| 0.97 (0.93 1.004) | 0.08 | 1.15 (0.88 1.50) | 1.00 | 0.93 (0.80 1.09) | 0.57 (0.33 0.97) |
 | HR (95% CI)c | 0.97 (0.94 1.01) | 0.17 | 1.16 (0.89 1.53) | 1.00 | 0.93 (0.79 1.09) | 0.66 (0.38 1.12) |
Ovary | Cases | 561 | Â | 44 | 354 | 149 | 14 |
 | HR (95% CI)* | 0.99 (0.95 1.04) | 0.75 | 0.99 (0.72 1.35) | 1.00 | 0.90 (0.74 1.09) | 1.08 (0.63 1.85) |
 | HR (95% CI)†| 0.997 (0.95 1.04) | 0.91 | 0.98 (0.71 1.35) | 1.00 | 0.90 (0.74 1.11) | 1.14 (0.66 1.95) |
 | HR (95% CI) | 0.997 (0.95 1.04) | 0.91 | 0.98 (0.71 1.35) | 1.00 | 0.90 (0.74 1.11) | 1.14 (0.66 1.95) |
Prostate | Cases | 5898 | Â | 335 | 3340 | 2032 | 191 |
 | HR (95% CI)* | 0.98 (0.97 0.99) | < 0.001** | 1.07 (0.95 1.19) | 1.00 | 0.96 (0.91 1.01) | 0.86 (0.74 0.99) |
 | HR (95% CI)†| 0.99 (0.98 1.004) | 0.16** | 1.06 (0.94 1.19) | 1.00 | 1.01 (0.95 1.07) | 0.94 (0.81 1.10) |
 | HR (95% CI)h | 0.99 (0.98 1.005) | 0.21** | 1.05 (0.93 1.18) | 1.00 | 1.01 (0.95 1.07) | 0.94 (0.81 1.10) |
Oesophagus | Cases | 528 | Â | 28 | 272 | 216 | 12 |
 | HR (95% CI)* | 1.05 (1.02 1.10) | 0.006 | 1.02 (0.69 1.50) | 1.00 | 1.34 (1.12 1.60) | 0.75 (0.42 1.34) |
 | HR (95% CI)†| 1.003 (0.96 1.05) | 0.89 | 1.13 (0.77 1.68) | 1.00 | 1.13 (0.94 1.36) | 0.54 (0.29 0.99) |
 | HR (95% CI)f | 1.001 (0.96 1.04) | 0.95 | 1.15 (0.77 1.69) | 1.00 | 1.12 (0.93 1.36) | 0.54 (0.29 0.99) |
Stomach | Cases | 348 | Â | 14 | 177 | 141 | 16 |
 | HR (95% CI)* | 1.08 (1.04 1.13) | < 0.001 | 0.77 (0.45 1.33) | 1.00 | 1.37 (1.09 1.71) | 1.58 (0.95 2.63) |
 | HR (95% CI)†| 1.03 (0.98 1.08) | 0.19 | 0.75 (0.43 1.32) | 1.00 | 1.12 (0.89 1.42) | 1.07 (0.61 1.85) |
 | HR (95% CI) | 1.03 (0.98 1.08) | 0.19 | 0.75 (0.43 1.32) | 1.00 | 1.12 (0.89 1.42) | 1.07 (0.61 1.85) |
Oesophagus and stomach | Cases | 870 | Â | 42 | 444 | 356 | 28 |
 | HR (95% CI)* | 1.07 (1.04 1.10) | < 0.001 | 0.93 (0.68 1.28) | 1.00 | 1.36 (1.18 1.57) | 1.09 (0.74 1.59) |
 | HR (95% CI)†| 1.02 (0.98 1.05) | 0.31 | 0.99 (0.72 1.36) | 1.00 | 1.14 (0.98 1.32) | 0.76 (0.50 1.14) |
 | HR (95% CI)f | 1.02 (0.98 1.05) | 0.34 | 0.99 (0.72 1.37) | 1.00 | 1.13 (0.98 1.31) | 0.76 (0.50 1.14) |
Hepatobiliary tract | Cases | 446 | Â | 22 | 249 | 156 | 19 |
 | HR (95% CI)* | 1.05 (1.01 1.10) | 0.02 | 0.84 (0.54 1.29) | 1.00 | 1.11 (0.90 1.35) | 1.45 (0.91 2.31) |
 | HR (95% CI)†| 1.01 (0.96 1.05) | 0.73 | 0.82 (0.52 1.30) | 1.00 | 0.95 (0.77 1.18) | 1.05 (0.65 1.72) |
 | HR (95% CI) | 1.01 (0.96 1.05) | 0.73 | 0.82 (0.52 1.30) | 1.00 | 0.95 (0.77 1.18) | 1.05 (0.65 1.72) |
Pancreatic | Cases | 604 | Â | 30 | 333 | 220 | 21 |
 | HR (95% CI)* | 1.04 (1.004 1.08) | 0.03 | 0.85 (0.58 1.23) | 1.00 | 1.17 (0.99 1.39) | 1.22 (0.78 1.89) |
 | HR (95% CI)†| 1.02 (0.98 1.06) | 0.37 | 0.86 (0.58 1.26) | 1.00 | 1.10 (0.92 1.31) | 1.01 (0.64 1.60) |
 | HR (95% CI)d | 1.02 (0.98 1.06) | 0.45 | 0.86 (0.58 1.26) | 1.00 | 1.08 (0.91 1.30) | 0.99 (0.63 1.57) |
Kidney | Cases | 771 | Â | 43 | 417 | 279 | 32 |
 | HR (95% CI)* | 1.04 (1.01. 1.08) | 0.01 | 0.98 (0.71 1.34) | 1.00 | 1.19 (1.02 1.38) | 1.38 (0.96 1.98) |
 | HR (95% CI)†| 1.01 (0.97 1.04) | 0.67** | 1.03 (0.74 1.44) | 1.00 | 1.07 (0.91 1.25) | 1.14 (0.79 1.66) |
 | HR (95% CI) | 1.01 (0.97 1.04) | 0.67** | 1.03 (0.74 1.44) | 1.00 | 1.07 (0.91 1.25) | 1.14 (0.79 1.66) |
Bladder | Cases | 662 | Â | 24 | 351 | 259 | 28 |
 | HR (95% CI)* | 1.06 (1.02 1.09) | 0.001 | 0.69 (0.46 1.04) | 1.00 | 1.21 (1.03 1.42) | 1.36 (0.93 2.00) |
 | HR (95% CI)†| 1.01 (0.98 1.05) | 0.50** | 0.76 (0.50 1.16) | 1.00 | 1.10 (0.93 1.30) | 0.99 (0.65 1.53) |
 | HR (95% CI) | 1.01 (0.98 1.05) | 0.50** | 0.76 (0.50 1.16) | 1.00 | 1.10 (0.93 1.30) | 0.99 (0.65 1.53) |
Colorectal | Cases | 3290 | Â | 180 | 1896 | 1096 | 118 |
 | HR (95% CI)* | 1.02 (1.002 1.04) | 0.03** | 0.88 (0.76 1.03) | 1.00 | 1.04 (0.97 1.12) | 1.16 (0.97 1.40) |
 | HR (95% CI)†| 1.01 (0.99 1.03) | 0.41** | 0.92 (0.79 1.08) | 1.00 | 1.003 (0.93 1.08) | 1.11 (0.91 1.35) |
 | HR (95% CI)e, g, f (males) | 1.01 (0.99 1.02) | 0.58** | 0.89 (0.76 1.04) | 1.00 | 0.99 (0.91 1.07) | 1.08 (0.88 1.32) |
Colon | Cases | 2110 | Â | 111 | 1202 | 721 | 76 |
 | HR (95% CI)* | 1.03 (1.01 1.05) | 0.003** | 0.86 (0.70 1.04) | 1.00 | 1.08 (0.99 1.19) | 1.21 (0.96 1.53) |
 | HR (95% CI)†| 1.02 (0.998 1.04) | 0.08** | 0.91 (0.75 1.11) | 1.00 | 1.04 (0.95 1.15) | 1.16 (0.91 1.48) |
 | HR (95% CI)e, g, f (males) | 1.02 (0.99 1.04) | 0.15** | 0.90 (0.73 1.10) | 1.00 | 1.04 (0.94 1.15) | 1.12 (0.88 1.44) |
Rectum | Cases | 1107 | Â | 64 | 645 | 358 | 40 |
 | HR (95% CI)* | 0.998 (0.97 1.03) | 0.89** | 0.94 (0.73 1.21) | 1.00 | 0.99 (0.87 1.13) | 1.10 (0.80 1.51) |
 | HR (95% CI)†| 0.99 (0.96 1.02) | 0.38 | 0.95 (0.73 1.25) | 1.00 | 0.95 (0.83 1.09) | 1.04 (0.74 1.46) |
 | HR (95% CI)e, g | 0.98 (0.95 1.02) | 0.31 | 0.91 (0.69 1.20) | 1.00 | 0.92 (0.80 1.06) | 1.01 (0.72 1.43) |
Brain tumours | Cases | 458 | Â | 28 | 269 | 145 | 16 |
 | HR (95% CI)* | 1.01 (0.97 1.06) | 0.50 | 0.96 (0.65 1.42) | 1.00 | 0.99 (0.81 1.22) | 1.07 (0.65 1.77) |
 | HR (95% CI)†| 1.02 (0.98 1.07) | 0.31 | 0.98 (0.66 1.46) | 1.00 | 1.001 (0.81 1.24) | 1.13 (0.67 1.91) |
 | HR (95% CI)f | 1.03 (0.98 1.07) | 0.28 | 0.97 (0.65 1.45) | 1.00 | 1.01 (0.81 1.25) | 1.13 (0.67 1.92) |
Thyroid | Cases | 236 | Â | 15 | 154 | 62 | 5 |
 | HR (95% CI)* | 0.99 (0.93 1.06) | 0.86 | 0.78 (0.46 1.32) | 1.00 | 0.87 (0.65 1.18) | 0.71 (0.29 1.72) |
 | HR (95% CI)†| 0.999 (0.93 1.07) | 0.97 | 0.76 (0.44 1.32) | 1.00 | 0.88 (0.64 1.20) | 0.70 (0.28 1.72) |
 | HR (95% CI) | 0.999 (0.93 1.07) | 0.97 | 0.76 (0.44 1.32) | 1.00 | 0.88 (0.64 1.20) | 0.70 (0.28 1.72) |
Haematological malignancies | Cases | 2427 | Â | 142 | 1396 | 806 | 83 |
 | HR (95% CI)* | 1.02 (0.998 1.04) | 0.09 | 0.95 (0.80 1.12) | 1.00 | 1.04 (0.96 1.14) | 1.12 (0.90 1.40) |
 | HR (95% CI)†| 1.01 (0.99 1.03) | 0.43 | 0.96 (0.80 1.15) | 1.00 | 1.02 (0.93 1.12) | 1.07 (0.85 1.34) |
 | HR (95% CI) | 1.01 (0.99 1.03) | 0.43 | 0.96 (0.80 1.15) | 1.00 | 1.02 (0.93 1.12) | 1.07 (0.85 1.34) |
Non-Hodgkin’s lymphoma | Cases | 1174 |  | 68 | 675 | 392 | 39 |
 | HR (95% CI)* | 1.02 (0.99 1.04) | 0.28 | 0.93 (0.72 1.19) | 1.00 | 1.06 (0.93 1.20) | 1.10 (0.80 1.52) |
 | HR (95% CI)†| 1.01 (0.98 1.04) | 0.43 | 0.93 (0.72 1.20) | 1.00 | 1.08 (0.95 1.23) | 1.06 (0.75 1.48) |
 | HR (95% CI) | 1.01 (0.98 1.04) | 0.43 | 0.93 (0.72 1.20) | 1.00 | 1.08 (0.95 1.23) | 1.06 (0.75 1.48) |