Table 1.
Characteristics of students by frequency of social media use.
| Characteristics | Social media frequency observations, n (%) | P value | |||||||||||||||
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Never (n=3087) | A few times a year (n=990) | 1-2 times a month (n=1607) | Once a week (n=4479) | Every day (n=33,831) | Total (N=43,994) |
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| Frequency of physical activity | <.001 | ||||||||||||||||
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Never/seldom | 312 (22.3) | 101 (21.0) | 145 (19.0) | 321 (16.7) | 2684 (16.56) | 3563 (17.14) |
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Sometimes | 499 (36.8) | 160 (37) | 304 (40.5) | 722 (36.1) | 5598 (34.36) | 7283 (34.98) |
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Every day/nearly every day | 543 (40.9) | 185 (42.0) | 307 (40.5) | 960 (47.2) | 8038 (49.08) | 10,033 (47.88) |
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| Frequency of sleeping 7 hours/day | <.001 | ||||||||||||||||
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Never/seldom | 206 (13.8) | 87 (20.0) | 149 (19.2) | 352 (16.3) | 3192 (18.96) | 3986 (18.39) |
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Sometimes | 449 (33.1) | 162 (36.0) | 270 (34.5) | 763 (38.7) | 6631 (40.83) | 8275 (39.79) |
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Every day/nearly every day | 703 (53.1) | 196 (44.0) | 330 (46.3) | 894 (45.0) | 6566 (40.22) | 8689 (41.82) |
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| Survey year | <.001 | ||||||||||||||||
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2014 | 1553 (50.00) | 527 (53.0) | 815 (49.7) | 2256 (50.44) | 15,935 (47.08) | 21,086 (47.86) |
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2015 | 1534 (50.00) | 463 (47.0) | 792 (50.3) | 2223 (49.56) | 17,896 (52.92) | 22,908 (52.14) |
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| Grade | <.001 | ||||||||||||||||
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8th | 1811 (58.68) | 511 (50.0) | 754 (45.5) | 2282 (50.79) | 14,653 (42.68) | 20,011 (44.91) |
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10th | 1105 (36.56) | 393 (42.4) | 692 (45.3) | 1780 (40.74) | 15,579 (47.69) | 19,549 (45.98) |
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12th | 171 (4.7) | 86 (8.0) | 161 (9.0) | 417 (8.5) | 3599 (9.63) | 4434 (9.11) |
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| Sex | <.001 | ||||||||||||||||
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Male | 1989 (67.46) | 670 (70.7) | 1066 (70.13) | 2786 (63.96) | 14,280 (43.53) | 20,791 (48.87) |
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Female | 950 (32.5) | 272 (29.3) | 453 (29.9) | 1454 (36.04) | 18,147 (56.47) | 21,276 (51.13) |
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| Region | <.001 | ||||||||||||||||
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North east | 572 (16.2) | 178 (17.1) | 279 (15.0) | 829 (17.0) | 6631 (18.18) | 8489 (17.78) |
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North central | 604 (21.3) | 204 (21.4) | 311 (22.1) | 912 (22.1) | 6812 (22.00) | 8843 (21.95) |
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South | 1153 (35.8) | 363 (35.1) | 630 (36.9) | 1657 (35.32) | 13,357 (38.02) | 17,160 (37.48) |
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West | 758 (26.7) | 245 (26.1) | 387 (26.0) | 1081 (25.61) | 7031 (21.80) | 9502 (22.79) |
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| Metropolitan statistical area | .01 | ||||||||||||||||
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No | 597 (19.5) | 222 (22.0) | 364 (22.9) | 995 (21.3) | 6863 (19.59) | 9041 (19.93) |
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Yes | 2490 (80.5) | 768 (78.0) | 1243 (77.11) | 3484 (78.74) | 26,968 (80.41) | 34,953 (80.07) |
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| Level of happiness | .03 | ||||||||||||||||
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Not too happy | 502 (15.9) | 159 (17) | 285 (17.5) | 650 (14.8) | 5448 (16.34) | 7044 (16.19) |
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Pretty happy | 1918 (63.5) | 634 (65.7) | 1045 (66.14) | 2945 (66.75) | 21,839 (65.50) | 28,381 (65.52) |
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Very happy | 623 (20.6) | 177 (17.8) | 257 (16.4) | 815 (18.5) | 6163 (18.16) | 8035 (18.29) |
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| Homework (hours/week) | .09 | ||||||||||||||||
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0 | 210 (7.3) | 80 (9) | 142 (8.7) | 325 (8.09) | 2693 (7.98) | 3450 (7.99) |
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1-4 | 1397 (47.71) | 462 (49.8) | 773 (50.7) | 2146 (51.08) | 16,521 (50.14) | 21,029 (50.08) |
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5-9 | 596 (20.1) | 191 (20) | 294 (19.3) | 893 (20.6) | 6362 (19.58) | 8336 (19.72) |
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10-14 | 337 (11.2) | 104 (10.9) | 152 (10.1) | 422 (9.5) | 3327 (9.94) | 4342 (9.99) |
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15-19 | 169 (5.6) | 37 (4) | 69 (5) | 235 (5.1) | 1781 (5.47) | 2291 (5.39) |
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20-24 | 123 (4.7) | 32 (4) | 43 (3) | 121 (2.8) | 1174 (3.50) | 1493 (3.49) |
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≥25 | 99 (3) | 30 (3) | 47 (3) | 125 (2.8) | 1090 (3.40) | 1391 (3.34) |
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| Letter grade | <.001 | ||||||||||||||||
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D | 82 (3) | 33 (4) | 58 (4) | 102 (2.5) | 856 (2.5) | 1131 (2.63) |
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C– | 89 (3) | 32 (4) | 68 (4) | 147 (3.7) | 1194 (3.69) | 1530 (3.68) |
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C | 117 (4.4) | 48 (5) | 92 (6) | 278 (6.6) | 1796 (5.55) | 2331 (5.59) |
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C+ | 173 (5.6) | 81 (9) | 139 (9.3) | 403 (9.9) | 2953 (9.09) | 3749 (8.93) |
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B– | 203 (6.4) | 102 (10.4) | 160 (10.4) | 455 (10.7) | 3308 (10.33) | 4228 (10.11) |
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B | 374 (13.3) | 148 (14.4) | 236 (15.7) | 698 (16.5) | 4968 (15.16) | 6424 (15.16) |
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B+ | 461 (15.4) | 161 (17.3) | 255 (18.5) | 676 (15.6) | 5725 (17.71) | 7278 (17.35) |
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A– | 592 (20.6) | 156 (18.4) | 231 (15.7) | 724 (17.2) | 5707 (17.49) | 7410 (17.62) |
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A | 835 (28.4) | 177 (18.8) | 256 (16.3) | 771 (17.3) | 6013 (18.42) | 8052 (18.93) |
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