|  | 1 h increase in computer use time | p-value | None | ≤1 h (reference) | 1- ≤ 3 h | > 3 h |
---|---|---|---|---|---|---|---|
Person-years | Â | 3,498,487 | Â | 969,721 | 1,744,785 | 582,168 | 201,813 |
Skin, melanoma | Cases | 1621 | Â | 404 | 852 | 276 | 89 |
HR (95% CI)* | 1.01 (0.98 1.05) | 0.43** | 0.77 (0.68 0.86) | 1.00 | 0.90 (0.79 1.04) | 0.92 (0.74 1.14) | |
 | HR (95% CI)†| 1.01 (0.97 1.05) | 0.72 | 0.90 (0.79 1.02) | 1.00 | 0.97 (0.85 1.12) | 0.99 (0.79 1.24) |
 | HR (95% CI)a | 1.01 (0.97 1.05) | 0.73 | 0.91 (0.80 1.03) | 1.00 | 0.98 (0.85 1.12) | 0.996 (0.79 1.25) |
Oropharyngeal | Cases | 561 | Â | 209 | 239 | 88 | 25 |
 | HR (95% CI)* | 0.90 (0.84 0.97) | 0.004 | 1.56 (1.29 1.88) | 1.00 | 0.97 (0.76 1.23) | 0.81 (0.54 1.23) |
 | HR (95% CI)†| 0.93 (0.87 0.998) | 0.04 | 1.27 (1.03 1.56) | 1.00 | 0.91 (0.71 1.17) | 0.77 (0.51 1.17) |
 | HR (95% CI) | 0.93 (0.87 0.998) | 0.04 | 1.27 (1.03 1.56) | 1.00 | 0.91 (0.71 1.17) | 0.77 (0.51 1.17) |
Lung | Cases | 2040 | Â | 894 | 700 | 316 | 130 |
HR (95% CI)* | 0.97 (0.93 1.003) | 0.08** | 1.84 (1.66 2.03) | 1.00 | 1.17 (1.03 1.34) | 1.68 (1.39 2.03) | |
 | HR (95% CI)†| 1.02 (0.99 1.06) | 0.16** | 1.10 (0.99 1.23) | 1.00 | 1.01 (0.88 1.16) | 1.33 (1.10 1.62) |
 | HR (95% CI)h | 1.02 (0.99 1.06) | 0.16** | 1.11 (0.99 1.24) | 1.00 | 0.996 (0.87 1.15) | 1.36 (1.12 1.65) |
Breast (female only) | Cases | 5650 | Â | 1728 | 2931 | 762 | 229 |
HR (95% CI)* | 1.01 (0.99 1.03) | 0.27** | 0.93 (0.88 0.99) | 1.00 | 1.02 (0.94 1.10) | 0.997 (0.87 1.14) | |
 | HR (95% CI)†| 1.003 (0.98 1.03) | 0.83** | 0.97 (0.91 1.04) | 1.00 | 0.999 (0.92 1.08) | 1.001 (0.87 1.15) |
 | HR (95% CI)b, f, h | 1.01 (0.98 1.03) | 0.57** | 0.96 (0.90 1.04) | 1.00 | 0.998 (0.91 1.09) | 1.03 (0.89 1.20) |
Uterus | Cases | 863 | Â | 315 | 389 | 127 | 32 |
 | HR (95% CI)* | 1.01 (0.95 1.07) | 0.74 | 1.18 (1.02 1.38) | 1.00 | 1.25 (1.03 1.53) | 1.12 (0.78 1.60) |
 | HR (95% CI)†| 0.96 (0.90 1.02) | 0.20 | 1.18 (0.999 1.39) | 1.00 | 1.04 (0.84 1.28) | 0.91 (0.63 1.33) |
 | HR (95% CI)c | 0.98 (0.92 1.04) | 0.47 | 1.16 (0.98 1.37) | 1.00 | 1.08 (0.87 1.35) | 0.95 (0.64 1.40) |
Ovary | Cases | 567 | Â | 211 | 266 | 63 | 27 |
 | HR (95% CI)* | 0.98 (0.91 1.05) | 0.51 | 1.16 (0.96 1.39) | 1.00 | 0.91 (0.69 1.19) | 1.36 (0.91 2.02) |
 | HR (95% CI)†| 0.96 (0.89 1.04) | 0.36 | 1.23 (1.01 1.50) | 1.00 | 0.91 (0.69 1.21) | 1.36 (0.91 2.04) |
 | HR (95% CI) | 0.96 (0.89 1.04) | 0.36 | 1.23 (1.01 1.50) | 1.00 | 0.91 (0.69 1.21) | 1.36 (0.91 2.04) |
Prostate | Cases | 5933 | Â | 1543 | 2699 | 1298 | 393 |
 | HR (95% CI)* | 1.005 (0.99 1.02) | 0.61** | 0.91 (0.85 0.97) | 1.00 | 0.97 (0.91 1.03) | 0.97 (0.87 1.07) |
 | HR (95% CI)†| 0.998 (0.98 1.02) | 0.85** | 0.98 (0.92 1.06) | 1.00 | 0.99 (0.93 1.06) | 0.9998 (0.90 1.12) |
 | HR (95% CI)h | 0.997 (0.98 1.02) | 0.73** | 0.99 (0.92 1.06) | 1.00 | 0.99 (0.93 1.06) | 0.99 (0.89 1.11) |
Oesophagus | Cases | 530 | Â | 174 | 221 | 108 | 27 |
 | HR (95% CI)* | 0.97 (0.90 1.03) | 0.32 | 1.20 (0.98 1.47) | 1.00 | 1.13 (0.90 1.42) | 0.94 (0.63 1.41) |
 | HR (95% CI)†| 0.97 (0.90 1.04) | 0.37 | 0.99 (0.79 1.23) | 1.00 | 1.02 (0.81 1.30) | 0.78 (0.51 1.19) |
 | HR (95% CI)f | 0.97 (0.90 1.04) | 0.35 | 0.99 (0.79 1.23) | 1.00 | 1.02 (0.80 1.30) | 0.77 (0.51 1.18) |
Stomach | Cases | 349 | Â | 133 | 133 | 61 | 22 |
 | HR (95% CI)* | 0.98 (0.90 1.06) | 0.60 | 1.50 (1.18 1.92) | 1.00 | 1.09 (0.80 1.47) | 1.30 (0.83 2.05) |
 | HR (95% CI)†| 0.98 (0.91 1.07) | 0.71 | 1.16 (0.88 1.51) | 1.00 | 0.98 (0.72 1.35) | 1.04 (0.64 1.69) |
 | HR (95% CI) | 0.98 (0.91 1.07) | 0.71 | 1.16 (0.88 1.51) | 1.00 | 0.98 (0.72 1.35) | 1.04 (0.64 1.69) |
Oesophagus and stomach | Cases | 873 | Â | 305 | 352 | 168 | 48 |
 | HR (95% CI)* | 0.97 (0.92 1.02) | 0.25 | 1.31 (1.12 1.53) | 1.00 | 1.11 (0.93 1.34) | 1.06 (0.79 1.44) |
 | HR (95% CI)†| 0.97 (0.92 1.03) | 0.33 | 1.05 (0.89 1.25) | 1.00 | 1.01 (0.83 1.22) | 0.86 (0.62 1.19) |
 | HR (95% CI)f | 0.97 (0.92 1.03) | 0.32 | 1.05 (0.89 1.25) | 1.00 | 1.01 (0.83 1.22) | 0.86 (0.62 1.19) |
Hepatobiliary tract | Cases | 451 | Â | 170 | 168 | 91 | 22 |
 | HR (95% CI)* | 0.97 (0.90 1.04) | 0.42 | 1.49 (1.20 1.85) | 1.00 | 1.38 (1.07 1.79) | 1.14 (0.73 1.77) |
 | HR (95% CI)†| 0.99 (0.92 1.06) | 0.74 | 1.21 (0.95 1.53) | 1.00 | 1.30 (0.997 1.69) | 1.02 (0.65 1.61) |
 | HR (95% CI) | 0.99 (0.92 1.06) | 0.74 | 1.21 (0.95 1.53) | 1.00 | 1.30 (0.997 1.69) | 1.02 (0.65 1.61) |
Pancreatic | Cases | 606 | Â | 189 | 276 | 114 | 27 |
 | HR (95% CI)* | 0.98 (0.92 1.05) | 0.62 | 1.01 (0.83 1.21) | 1.00 | 1.07 (0.86 1.34) | 0.87 (0.59 1.29) |
 | HR (95% CI)†| 0.98 (0.92 1.05) | 0.62 | 0.90 (0.73 1.11) | 1.00 | 1.05 (0.84 1.31) | 0.76 (0.50 1.15) |
 | HR (95% CI)d | 0.98 (0.92 1.05) | 0.61 | 0.90 (0.73 1.10) | 1.00 | 1.05 (0.84 1.31) | 0.76 (0.50 1.14) |
Kidney | Cases | 783 | Â | 251 | 333 | 149 | 50 |
 | HR (95% CI)* | 1.01 (0.96 1.07) | 0.60 | 1.17 (0.995 1.39) | 1.00 | 1.12 (0.92 1.36) | 1.23 (0.91 1.66) |
 | HR (95% CI)†| 1.02 (0.97 1.08) | 0.39** | 1.04 (0.87 1.25) | 1.00 | 1.05 (0.86 1.29) | 1.19 (0.88 1.61) |
 | HR (95% CI) | 1.02 (0.97 1.08) | 0.39** | 1.04 (0.87 1.25) | 1.00 | 1.05 (0.86 1.29) | 1.19 (0.88 1.61) |
Bladder | Cases | 670 | Â | 227 | 271 | 142 | 30 |
 | HR (95% CI)* | 0.98 (0.93 1.04) | 0.54 | 1.22 (1.02 1.46) | 1.00 | 1.18 (0.96 1.44) | 0.85 (0.59 1.25) |
 | HR (95% CI)†| 0.97 (0.92 1.04) | 0.41** | 1.09 (0.89 1.32) | 1.00 | 1.08 (0.87 1.33) | 0.76 (0.51 1.13) |
 | HR (95% CI) | 0.97 (0.92 1.04) | 0.41** | 1.09 (0.89 1.32) | 1.00 | 1.08 (0.87 1.33) | 0.76 (0.51 1.13) |
Colorectal | Cases | 3312 | Â | 1059 | 1512 | 556 | 185 |
 | HR (95% CI)* | 0.99 (0.96 1.02) | 0.45** | 1.07 (0.99 1.16) | 1.00 | 0.95 (0.87 1.05) | 1.05 (0.90 1.23) |
 | HR (95% CI)†| 0.99 (0.96 1.01) | 0.31** | 1.08 (0.99 1.18) | 1.00 | 0.95 (0.86 1.05) | 1.03 (0.88 1.21) |
 | HR (95% CI)e, g, f (males) | 0.98 (0.96 1.01) | 0.28** | 1.06 (0.97 1.16) | 1.00 | 0.95 (0.86 1.05) | 1.02 (0.87 1.20) |
Colon | Cases | 2124 | Â | 681 | 980 | 348 | 115 |
 | HR (95% CI)* | 0.99 (0.96 1.03) | 0.63** | 1.04 (0.94 1.15) | 1.00 | 0.94 (0.83 1.06) | 1.04 (0.86 1.26) |
 | HR (95% CI)†| 0.99 (0.95 1.02) | 0.50** | 1.04 (0.93 1.15) | 1.00 | 0.93 (0.82 1.06) | 1.02 (0.83 1.24) |
 | HR (95% CI)e, g, f (males) | 0.99 (0.95 1.02) | 0.42** | 1.03 (0.92 1.14) | 1.00 | 0.93 (0.82 1.06) | 1.02 (0.83 1.25) |
Rectum | Cases | 1115 | Â | 354 | 501 | 195 | 65 |
 | HR (95% CI)* | 0.98 (0.94 1.03) | 0.42** | 1.12 (0.98 1.29) | 1.00 | 0.97 (0.82 1.14) | 1.04 (0.80 1.35) |
 | HR (95% CI)†| 0.97 (0.93 1.02) | 0.28 | 1.20 (1.03 1.39) | 1.00 | 0.97 (0.82 1.15) | 1.03 (0.79 1.35) |
 | HR (95% CI)e, g | 0.97 (0.93 1.02) | 0.28 | 1.16 (0.999 1.36) | 1.00 | 0.96 (0.81 1.15) | 0.999 (0.76 1.32) |
Thyroid | Cases | 237 | Â | 82 | 106 | 35 | 14 |
 | HR (95% CI)* | 1.02 (0.92 1.12) | 0.76 | 1.31 (0.98 1.76) | 1.00 | 1.10 (0.75 1.61) | 1.32 (0.76 2.31) |
 | HR (95% CI)†| 1.01 (0.91 1.11) | 0.86 | 1.36 (0.99 1.87) | 1.00 | 1.08 (0.73 1.59) | 1.28 (0.73 2.25) |
 | HR (95% CI) | 1.01 (0.91 1.11) | 0.86 | 1.36 (0.99 1.87) | 1.00 | 1.08 (0.73 1.59) | 1.28 (0.73 2.25) |
Brain tumours | Cases | 463 | Â | 130 | 221 | 87 | 25 |
 | HR (95% CI)* | 1.02 (0.95 1.09) | 0.62 | 0.95 (0.77 1.19) | 1.00 | 1.02 (0.79 1.31) | 0.93 (0.61 1.40) |
 | HR (95% CI)†| 1.03 (0.96 1.10) | 0.39 | 0.92 (0.72 1.17) | 1.00 | 1.03 (0.80 1.34) | 0.96 (0.63 1.47) |
 | HR (95% CI)f | 1.03 (0.96 1.10) | 0.38 | 0.92 (0.72 1.17) | 1.00 | 1.04 (0.80 1.34) | 0.97 (0.63 1.48) |
Haematological malignancies | Cases | 2446 | Â | 714 | 1137 | 445 | 150 |
 | HR (95% CI)* | 1.03 (0.998 1.06) | 0.06 | 0.95 (0.87 1.05) | 1.00 | 1.02 (0.92 1.14) | 1.14 (0.96 1.36) |
 | HR (95% CI)†| 1.02 (0.99 1.05) | 0.24 | 0.95 (0.86 1.06) | 1.00 | 0.997 (0.89 1.12) | 1.11 (0.93 1.32) |
 | HR (95% CI) | 1.02 (0.99 1.05) | 0.24 | 0.95 (0.86 1.06) | 1.00 | 0.997 (0.89 1.12) | 1.11 (0.93 1.32) |
Non-Hodgkin’s lymphoma | Cases | 1182 |  | 349 | 545 | 225 | 63 |
 | HR (95% CI)* | 1.02 (0.98 1.06) | 0.37 | 0.97 (0.85 1.11) | 1.00 | 1.09 (0.94 1.28) | 1.02 (0.78 1.32) |
 | HR (95% CI)†| 1.01 (0.97 1.06) | 0.65 | 0.996 (0.86 1.15) | 1.00 | 1.07 (0.91 1.26) | 1.03 (0.79 1.34) |
 | HR (95% CI) | 1.01 (0.97 1.06) | 0.65 | 0.996 (0.86 1.15) | 1.00 | 1.07 (0.91 1.26) | 1.03 (0.79 1.34) |