Objective To study the catch up growth during infancy in low birth weight infants ( LBWI). Methods 50 low birth weight infants ( LBWI group ) and 50 normal birth weight infants ( NBWI group ) admitted to the department of child health care of our hospital from January 2006 to September 2008 were retrospectively analyzed. Infants of the two groups were both given routine health examination: < one year old, health examination ≥ six times ( at least one time for every two months ); from one year old to two years old, health examination ≥ two times ( at least one time for every six months ) . The catch up growth of low birth weight infants was then assessed. Results The average age of LBWI group to catch up to growth was ( 6. 7 ± 5. 5 ) months, among which 28 cases ( 56% ) caught up to growth within six months, 15 cases ( 30% ) caught up to growth between six months to 12 months, six cases ( 12% ) caught up to growth between one year to two years old and one case ( 2% ) hadn't caught up to growth even at two years old. The body weight at birth, two months after birth and six months after birth between the two groups all showed statistically significant differences ( P < 0. 05 ) . The body weight at one year old and two years old of the two groups both showed no statistically significant differences ( P > 0. 05 ) . The average age of LBWI group to catch up to height growth was ( 7. 5 ±4. 9 ) months, among which 23 cases ( 46% ) caught up to height growth within six months, 22 cases ( 44% ) caught up to height growth between six months to 12 months, four cases ( 8% ) caught up to height growth between one year to two years old and one case ( 2% ) hadn't caught up to height growth even at two years old. The height at birth, two months after birth, six months after birth between the two groups all showed statistically significant differences ( P < 0. 05 ). The height at one year old and two years old between the two groups both showed no statistically significant differences ( P > 0. 05 ) . Conclusion Growth monitoring is of great importance for the initial catch up growth of low birth weight infants. Through guidance and positive nutritional support strategies, most low birth weight infants can catch up to 10th percent of the corresponding months of age in the first year.%目的 分析低出生体质量儿婴幼儿时期生长追赶的情况.方法 回顾性分析2006年1月-2008年9月在我院儿童保健科进行定期体检的低出生体质量儿(LBWI组)及正常足月儿(NBWI组)各50例,两组儿童均进行常规体检:＜1岁,体检≥6次(至少每2个月体检1次);1～2岁,体检≥2次(至少每6个月体检1次),对低出生体质量儿的生长追赶进行评估.结果 LBWI组体质量赶上生长的平均年龄为(6.7±5.5)个月;28例(56%)在6个月内体质量追赶上生长,15例(30%)在6～12个月内、6例(12%)在1～2岁内追赶上生长,1例(2%)在2岁时体质量仍未追赶上生长.两组出生时、出生2个月和6个月时体质量比较,差异均有统计学意义(P＜0.05);两组1岁和2岁时体质量比较,差异均无统计学意义(P＞0.05).LBWI组身高赶上生长的平均年龄为(7.5±4.9)个月;23例(46%)在6个月内身高追赶上生长,22例(44%)在6～12个月内、4例(8%)在1～2岁内追赶上生长,1例(2%)在2岁时仍未追赶上生长.两组出生时、出生2个月和6个月时身高比较,差异均有统计学意义(P＜0.05);两组1岁和2岁时身高比较,差异均无统计学意义(P＞0.05).结论 生长监测对于低出生体质量儿最初的生长追赶极为重要,通过进行指导和积极的营养支持策略,多数低出生体质量儿可在1岁内追赶至相应月龄的第10百分位以上.
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